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Logan	
  Burnett	
  
Professor	
  Sheffrin	
  
Behavioral	
  Economics	
  
28	
  November	
  2015	
  
	
  
Behavioral	
  Economics	
  in	
  Analyzing	
  Marriage	
  Decisions	
  &	
  Creating	
  Better	
  Outcomes	
  
	
  
	
  
ABSTRACT	
  
	
  
Marriage	
  is	
  an	
  economic	
  arrangement	
  just	
  as	
  much	
  as	
  it	
  is	
  an	
  intimate	
  relationship.	
  There	
  
are	
  both	
  financial	
  costs	
  and	
  economic	
  tradeoffs	
  that	
  individuals	
  experience	
  in	
  their	
  decision	
  
to	
  marry.	
  There	
  are	
  also	
  economic	
  benefits	
  that	
  incentivize	
  an	
  individual’s	
  pursuit	
  of	
  such	
  a	
  
commitment.	
  Individual	
  decisions	
  to	
  marry	
  also	
  have	
  significant	
  external	
  economic	
  effects	
  
on	
  population	
  growth,	
  consumption	
  of	
  scarce	
  resources,	
  distributive	
  allocations	
  of	
  goods	
  
and	
  services,	
  labor-­‐force	
  participation	
  of	
  women,	
  and	
  litigation	
  costs.	
  Marriage	
  is	
  most	
  
commonly	
  defined	
  as	
  “the	
  legally	
  recognized	
  union	
  between	
  two	
  individuals.”	
  	
  Individuals	
  
make	
  the	
  decision	
  to	
  engage	
  in	
  a	
  marital	
  relationship	
  for	
  a	
  variety	
  of	
  reasons,	
  including	
  
psychological	
  commitment,	
  division	
  of	
  household	
  labor,	
  and	
  for	
  creating	
  stable	
  
environments	
  for	
  raising	
  children.	
  However,	
  it	
  would	
  only	
  make	
  sense	
  for	
  two	
  individuals	
  to	
  
marry	
  one	
  another	
  if	
  they	
  each	
  expect	
  to	
  be	
  better	
  off	
  from	
  the	
  arrangement.	
  In	
  standard	
  
economic	
  terms,	
  a	
  marriage	
  will	
  occur	
  only	
  under	
  the	
  condition	
  that	
  there	
  is	
  an	
  expected	
  or	
  
experienced	
  gain	
  in	
  utility	
  for	
  each	
  individual.	
  	
  
This	
  analysis	
  will	
  focus	
  on	
  the	
  most	
  common	
  type	
  of	
  marital	
  arrangement,	
  one	
  between	
  
male	
  and	
  female.	
  Beyond	
  the	
  nature	
  of	
  marriage	
  having	
  economic	
  implications,	
  economic	
  
frameworks	
  can	
  demonstrate	
  how	
  individuals	
  choose	
  their	
  life	
  partners,	
  how	
  they	
  manage	
  
their	
  relationships,	
  and	
  provide	
  insight	
  into	
  why	
  many	
  marriages	
  paradoxically	
  diminish	
  
subjective	
  well-­‐being,	
  and	
  thus	
  commonly	
  end	
  in	
  divorce.	
  	
  Each	
  individual	
  in	
  a	
  marital	
  
arrangement	
  has	
  a	
  set	
  of	
  characteristics,	
  as	
  well	
  as	
  a	
  set	
  of	
  preferences	
  for	
  the	
  
characteristics	
  of	
  a	
  potential	
  partner.	
  These	
  individual	
  traits,	
  and	
  the	
  desire	
  for	
  specific	
  
qualities	
  vary	
  across	
  individuals,	
  and	
  may	
  include	
  factors	
  like	
  attractiveness,	
  intelligence,	
  
education,	
  income,	
  demographic	
  properties,	
  and	
  personality	
  characteristics.	
  This	
  analysis	
  
will	
  start	
  off	
  by	
  examining	
  the	
  costs	
  and	
  benefits	
  of	
  marrying	
  at	
  the	
  individual	
  level.	
  Next,	
  
this	
  paper	
  will	
  analyze	
  the	
  marriage	
  decisions	
  through	
  traditional	
  economic	
  theories	
  of	
  
choice.	
  Then,	
  concepts	
  from	
  behavioral	
  economics	
  will	
  be	
  applied	
  to	
  refine	
  and	
  expand	
  
models	
  of	
  choice	
  in	
  order	
  to	
  provide	
  a	
  more	
  realistic	
  understanding	
  of	
  how	
  individuals	
  
evaluate	
  marital	
  decisions;	
  and	
  will	
  offer	
  explanations	
  to	
  common	
  outcomes	
  surrounding	
  
marriage.	
  This	
  analysis	
  will	
  also	
  demonstrate	
  the	
  normative	
  value	
  of	
  using	
  behavioral	
  
economic	
  applications	
  and	
  models	
  for	
  fostering	
  improved	
  marital	
  outcomes	
  at	
  the	
  
individual	
  and	
  institutional	
  level.	
  	
  
	
  
THE	
  MARKET	
  FOR	
  MARRIAGE	
  AND	
  THE	
  DECISION	
  TO	
  MARRY	
  UNDER	
  EUT	
  
	
  
In	
  the	
  same	
  way	
  that	
  all	
  standard	
  economic	
  decisions	
  can	
  be	
  thought	
  of	
  and	
  rationalized	
  in	
  
terms	
  of	
  opportunity	
  costs,	
  the	
  decision	
  to	
  engage	
  in	
  a	
  marriage	
  involves	
  an	
  individual	
  
foregoing	
  the	
  benefits	
  of	
  being	
  single.	
  In	
  his	
  early	
  economic	
  analysis	
  of	
  the	
  family	
  Gary	
  
Becker	
  surmised	
  that	
  the	
  utility	
  received	
  from	
  either	
  being	
  single	
  or	
  married	
  could	
  be	
  
described	
  in	
  terms	
  of	
  benefits	
  and	
  costs	
  that	
  involve	
  payoffs	
  to	
  the	
  individual	
  (2).	
  The	
  
positive	
  payoffs	
  from	
  being	
  single	
  can	
  either	
  result	
  from	
  relatively	
  more	
  personal	
  living	
  
space,	
  greater	
  independence,	
  and	
  more	
  leisure	
  time.	
  The	
  benefits	
  arising	
  from	
  marriage	
  
include	
  commitment	
  and	
  amorousness,	
  joint	
  production	
  capabilities	
  such	
  as	
  conceiving	
  
child,	
  and	
  economies	
  of	
  scale	
  in	
  producing	
  household	
  commodities.	
  (2).	
  	
  Furthermore,	
  the	
  
decision	
  to	
  marry	
  is	
  complex	
  and	
  involves	
  a	
  great	
  deal	
  of	
  uncertainty	
  related	
  to	
  long-­‐term	
  
compatibility,	
  financial	
  stability,	
  and	
  exogenous	
  events	
  that	
  can	
  change	
  the	
  nature	
  of	
  a	
  
relationship.	
  The	
  uncertainty	
  is	
  enhanced	
  by	
  the	
  fact	
  that	
  individuals	
  must	
  base	
  their	
  
decision	
  on	
  current,	
  and	
  usually	
  limited	
  information	
  about	
  one	
  another,	
  as	
  well	
  as	
  
expectations	
  about	
  the	
  future	
  related	
  to	
  income,	
  and	
  limitations	
  on	
  self-­‐indulgence,	
  etc.	
  
Thus,	
  standard	
  economic	
  framework	
  has	
  been	
  applied	
  for	
  modeling	
  marital	
  decisions,	
  
although	
  there	
  are	
  many	
  shortcomings.	
  The	
  most	
  widely	
  used	
  model	
  of	
  decision-­‐making	
  
under	
  risk	
  or	
  uncertainty	
  is	
  derived	
  from	
  the	
  Expected	
  Utility	
  Theory.	
  Neo-­‐Classical	
  
Economics	
  ascertains	
  that	
  this	
  model	
  can	
  accurately	
  describe	
  economic	
  behavior,	
  and	
  so	
  it	
  
can	
  also	
  serve	
  to	
  be	
  the	
  normative	
  model	
  of	
  rational	
  choice.	
  	
  There	
  are	
  two	
  main	
  
assumptions	
  underlying	
  Expected	
  Utility	
  Theory:	
  First,	
  individuals	
  are	
  motivated	
  by	
  utility	
  
maximization;	
  and	
  second,	
  economic	
  actor’s	
  utility	
  maximization	
  desires	
  are	
  administered	
  
purely	
  by	
  self-­‐interest.	
  	
  Additional	
  considerations	
  involve	
  the	
  assumption	
  that	
  individuals	
  
have	
  well-­‐defined,	
  rank	
  ordered	
  preferences,	
  and	
  these	
  individuals	
  have	
  perfect	
  information	
  
regarding	
  their	
  choices	
  and	
  of	
  the	
  relevant	
  alternatives.	
  The	
  problem	
  with	
  this	
  model	
  of	
  
rational	
  choice	
  is	
  that	
  economic	
  agents	
  are	
  humans,	
  and	
  humans	
  have	
  cognitive	
  limitations.	
  
In	
  other	
  words,	
  individuals	
  have	
  a	
  finite	
  capacity	
  for	
  understanding	
  information	
  and	
  
subsequently	
  choosing	
  among	
  alternatives.	
  	
  In	
  the	
  real	
  word,	
  economic	
  agents	
  will	
  attempt	
  
to	
  reduce	
  uncertainty	
  by	
  seeking	
  out	
  information.	
  They	
  will	
  do	
  this	
  until	
  the	
  marginal	
  search	
  
costs	
  exceed	
  the	
  marginal	
  benefits	
  of	
  additional	
  information,	
  not	
  until	
  they	
  perfectly	
  
understand	
  all	
  relevant	
  information.	
  As	
  a	
  result,	
  economic	
  agents	
  will	
  use	
  heuristics	
  to	
  
simplify	
  their	
  decisions	
  in	
  the	
  face	
  of	
  complexity	
  and	
  uncertainty.	
  Use	
  of	
  such	
  simplifying	
  
mechanisms	
  leads	
  to	
  systematic	
  and	
  predictable	
  biases,	
  which	
  in	
  turn	
  often	
  produces	
  
suboptimal	
  outcomes	
  (4).	
  	
  The	
  “representativeness	
  heuristic”	
  is	
  relevant	
  in	
  marital	
  choice	
  
theory	
  in	
  that	
  prospective	
  couples	
  view	
  their	
  relationship	
  as	
  unique,	
  and	
  thus	
  do	
  not	
  believe	
  
that	
  their	
  relationship	
  is	
  representative	
  of	
  the	
  average	
  couple.	
  The	
  result	
  is	
  that	
  the	
  couple	
  is	
  
insensitive	
  to	
  the	
  fairly	
  high	
  probability	
  that	
  their	
  marriage	
  will	
  result	
  in	
  divorce.	
  
Individuals	
  are	
  also	
  subject	
  to	
  basing	
  their	
  decisions	
  on	
  the	
  ease	
  by	
  which	
  they	
  can	
  access	
  
information	
  about	
  outcomes	
  and	
  probabilities.	
  This	
  phenomenon	
  is	
  known	
  as	
  the	
  
“availability	
  heuristic”,	
  and	
  its	
  use	
  can	
  also	
  lead	
  to	
  systematic	
  errors	
  in	
  probability	
  
evaluation.	
  Thus,	
  individuals	
  may	
  base	
  their	
  decision	
  to	
  marry	
  on	
  inaccurate	
  assessments	
  of	
  
probabilities.	
  	
  	
  
	
  
EMPIRACALLY	
  PROVEN	
  FAILURES	
  IN	
  THE	
  MARKET	
  FOR	
  MARRIAGE	
  	
  
	
  
A	
  market	
  is	
  an	
  economic	
  structure	
  whereby	
  economic	
  actors	
  seek	
  to	
  maximize	
  their	
  
individual	
  outcomes	
  through	
  trading	
  scarce	
  resources.	
  Markets,	
  if	
  they	
  are	
  efficient	
  will	
  
achieve	
  the	
  optimal	
  allocation	
  of	
  resources,	
  which	
  in	
  turn	
  leads	
  to	
  the	
  maximization	
  of	
  
individual	
  satisfaction,	
  societal	
  enrichment,	
  and	
  economic	
  growth.	
  	
  No	
  real-­‐world	
  market	
  is	
  
perfectly	
  efficient	
  due	
  to	
  the	
  presence	
  of	
  simplifying	
  assumptions,	
  which	
  cannot	
  
wholesomely	
  quantify	
  the	
  complexities	
  of	
  the	
  world.	
  Thus,	
  all	
  markets	
  fail	
  in	
  one	
  way	
  or	
  
another.	
  	
  Even	
  marital	
  decisions	
  can	
  be	
  analyzed	
  by	
  applying	
  market	
  principles.	
  The	
  
‘marriage	
  market’	
  however,	
  fails	
  in	
  number	
  of	
  ways,	
  which	
  can	
  help	
  to	
  explain	
  why	
  so	
  many	
  
individuals	
  make	
  sub-­‐optimal	
  marital	
  decisions.	
  	
  First	
  of	
  all,	
  open	
  market	
  access	
  is	
  not	
  
possible,	
  and	
  the	
  result	
  is	
  that	
  the	
  market	
  for	
  marriage	
  is	
  extremely	
  segmented	
  (1).	
  This	
  is	
  
because	
  it	
  is	
  impossible	
  for	
  a	
  given	
  individual	
  to	
  access	
  to	
  everybody	
  in	
  the	
  world,	
  	
  and	
  
equally	
  as	
  impossible	
  for	
  an	
  individual	
  to	
  have	
  perfect	
  information	
  about	
  every	
  market	
  
participant.	
  There	
  are	
  also	
  particularly	
  high	
  search	
  costs	
  in	
  the	
  marriage	
  market.	
  
Furthermore,	
  the	
  marginal	
  benefits	
  of	
  information	
  are	
  low	
  due	
  to	
  the	
  overwhelming	
  
presence	
  of	
  asymmetric	
  information,	
  and	
  the	
  costs	
  of	
  attaining	
  the	
  information	
  are	
  high	
  in	
  
the	
  first	
  place	
  (1).	
  Because	
  information	
  gathered	
  about	
  a	
  potential	
  partner	
  at	
  the	
  evaluation	
  
stage	
  is	
  of	
  limited	
  value,	
  individuals	
  do	
  not	
  devotedly	
  search	
  for	
  the	
  partner	
  that	
  perfectly	
  
matches	
  their	
  preferences,	
  and	
  thus	
  conform	
  to	
  the	
  model	
  of	
  bounded	
  rationality.	
  (1).	
  In	
  the	
  
same	
  way,	
  because	
  actors	
  in	
  the	
  marriage	
  market	
  have	
  cognitive	
  limitations,	
  they	
  will	
  
satisfice	
  in	
  order	
  to	
  simplify	
  their	
  decision.	
  Also,	
  over	
  the	
  course	
  of	
  one’s	
  life,	
  individuals	
  
might	
  change	
  their	
  preferences	
  in	
  respect	
  to	
  the	
  characteristics	
  they	
  desire	
  their	
  spouse	
  to	
  
have,	
  or	
  about	
  the	
  type	
  of	
  relationship	
  they	
  wish	
  to	
  be	
  in.	
  The	
  choice	
  mechanisms	
  
individuals	
  use	
  to	
  find	
  a	
  partner	
  demonstrate	
  how	
  individual	
  actors	
  search	
  for	
  a	
  partner,	
  
and	
  offers	
  explanations	
  for	
  the	
  wide	
  presence	
  of	
  suboptimal	
  marital	
  outcomes	
  in	
  the	
  real	
  
world.	
  	
  
	
  
USING	
  PROSPECT	
  THEORY	
  FOR	
  EVALUATING	
  MARITAL	
  DECISIONS	
  
	
  
It	
  is	
  critical	
  that	
  when	
  considering	
  marriage,	
  individuals	
  use	
  the	
  most	
  refined	
  and	
  practical	
  
decision	
  mechanism,	
  as	
  making	
  the	
  wrong	
  choice	
  in	
  this	
  context	
  can	
  be	
  extremely	
  costly	
  
financially,	
  psychologically,	
  and	
  temporally.	
  The	
  problem	
  with	
  using	
  expected	
  utility	
  theory	
  
in	
  evaluating	
  whether	
  to	
  get	
  marred	
  or	
  not,	
  lies	
  in	
  the	
  fact	
  that	
  individuals	
  often	
  do	
  not	
  act	
  in	
  
accordance	
  with	
  the	
  theory	
  when	
  faced	
  with	
  real	
  world	
  decisions.	
  This	
  is	
  because	
  expected	
  
utility	
  theory	
  does	
  not	
  consider	
  how	
  individuals	
  frame	
  decisions	
  in	
  true	
  behavioral	
  settings.	
  	
  
Because	
  individuals	
  are	
  faced	
  with	
  uncertainty	
  in	
  decision	
  making,	
  and	
  do	
  not	
  have	
  the	
  
cognitive	
  capacity	
  to	
  perfectly	
  understand	
  all	
  relevant	
  information,	
  they	
  will	
  often	
  use	
  
heuristics	
  and	
  available	
  information	
  to	
  frame	
  the	
  decision	
  in	
  such	
  a	
  way	
  that	
  they	
  are	
  best	
  
able	
  to	
  consider	
  the	
  possible	
  outcomes,	
  and	
  the	
  value	
  of	
  those	
  outcomes	
  in	
  the	
  choice	
  
decision.	
  A	
  decision’s	
  frame	
  alone	
  can	
  cause	
  an	
  individual	
  to	
  reverse	
  his	
  or	
  her	
  preferences	
  
without	
  actually	
  changing	
  the	
  outcomes	
  of	
  the	
  choices	
  themselves.	
  This	
  empirically	
  proved	
  
fact,	
  known	
  as	
  the	
  Allais	
  Paradox,	
  does	
  not	
  coincide	
  with	
  rational	
  choice	
  theory;	
  whereby	
  
individuals	
  will	
  maximize	
  their	
  utility	
  irrespective	
  of	
  how	
  a	
  decision	
  is	
  presented	
  to	
  them.	
  	
  
Prospect	
  theory	
  accounts	
  for	
  the	
  widely	
  observed	
  behavioral	
  tendencies	
  that	
  economic	
  
agents	
  display	
  in	
  real	
  world	
  decision	
  settings,	
  but	
  that	
  are	
  not	
  included	
  in	
  the	
  traditional	
  
description	
  of	
  the	
  “Economic	
  Man”.	
  Prospect	
  Theory	
  therefore	
  might	
  offer	
  a	
  more	
  realistic	
  
and	
  applicable	
  model	
  of	
  choice	
  for	
  individuals	
  considering	
  marriage.	
  	
  In	
  the	
  first	
  phase	
  of	
  
Prospect	
  Theory,	
  referred	
  to	
  as	
  the	
  Editing	
  Phase,	
  individuals	
  will	
  simplify	
  the	
  choice	
  
decision	
  by	
  identifying	
  possible	
  outcomes,	
  and	
  establishing	
  a	
  reference	
  point	
  to	
  which	
  they	
  
can	
  assess	
  the	
  value	
  of	
  those	
  possible	
  outcomes.	
  Prospect	
  theory	
  suggests	
  that	
  individuals	
  
evaluate	
  decisions	
  in	
  terms	
  of	
  gains	
  and	
  losses	
  relative	
  to	
  a	
  reference	
  point,	
  rather	
  than	
  in	
  
terms	
  of	
  change	
  in	
  absolute	
  levels	
  of	
  wealth,	
  as	
  would	
  be	
  the	
  case	
  under	
  the	
  standard	
  model.	
  
Prospect	
  theory’s	
  value	
  function	
  differs	
  from	
  the	
  utility	
  function	
  in	
  that	
  it	
  accounts	
  for	
  the	
  
fact	
  that	
  people	
  are	
  loss	
  averse,	
  and	
  consequently	
  risk-­‐loving	
  when	
  they	
  are	
  in	
  a	
  loss	
  frame.	
  	
  
In	
  the	
  second	
  phase	
  of	
  prospect	
  theory,	
  the	
  individual	
  will	
  evaluate	
  prospects	
  by	
  assigning	
  
decision	
  weights,	
  based	
  on	
  subjectively	
  assessed	
  probabilities,	
  to	
  the	
  values	
  of	
  possible	
  
outcomes.	
  	
  These	
  decision	
  weights	
  essentially	
  measure	
  the	
  individuals	
  forecast	
  about	
  the	
  
chance	
  of	
  an	
  event	
  occurring.	
  	
  The	
  weighting	
  function	
  reflects	
  the	
  tendencies	
  of	
  individuals	
  
to	
  overweight	
  the	
  likelihood	
  of	
  unlikely	
  extreme	
  outcomes.	
  This	
  framework	
  is	
  carefully	
  
crafted	
  around	
  observable	
  and	
  empirically	
  proven	
  behavioral	
  tendencies,	
  and	
  consequently	
  
adjusts	
  economic	
  models	
  to	
  reflect	
  psychological	
  processes.	
  Prospect	
  theory	
  can	
  therefore	
  
be	
  of	
  useful	
  in	
  understanding	
  how	
  individuals	
  assess	
  potential	
  partners,	
  why	
  individuals	
  
initially	
  decide	
  to	
  enter	
  a	
  marriage,	
  and	
  how	
  agents	
  in	
  a	
  marital	
  relationship	
  make	
  decisions	
  
about	
  whether	
  to	
  continue	
  a	
  marriage	
  or	
  get	
  a	
  divorce.	
  (3).	
  	
  
	
  
PROSPECT	
  THEORY	
  &	
  ROLE	
  OF	
  LOSS	
  AVERSION	
  IN	
  SELECTING	
  A	
  PARTNER	
  
	
  
As	
  mentioned	
  earlier,	
  individuals	
  will	
  decide	
  to	
  get	
  married	
  if	
  they	
  find	
  a	
  partner	
  whose	
  
unique	
  characteristics	
  provide	
  payoffs	
  that	
  would	
  deliver	
  them	
  more	
  value	
  than	
  remaining	
  
single.	
  Under	
  prospect	
  theory,	
  people	
  will	
  assign	
  values	
  to	
  the	
  characteristics	
  of	
  a	
  potential	
  
partner,	
  and	
  therefore	
  the	
  expected	
  benefits	
  they	
  hope	
  to	
  receive	
  from	
  them.	
  They	
  will	
  also	
  
subjectively	
  assess	
  the	
  probability	
  that	
  those	
  qualities	
  will	
  result	
  in	
  gains	
  from	
  the	
  decision	
  
to	
  marry.	
  If	
  individuals	
  assess	
  the	
  prospect	
  that	
  a	
  marriage	
  will	
  deliver	
  them	
  greater	
  value	
  
than	
  their	
  current	
  welfare	
  state,	
  they	
  will	
  elect	
  to	
  engage	
  in	
  a	
  marriage.	
  	
  Because	
  in	
  the	
  real	
  
world	
  we	
  cannot	
  be	
  sure	
  that	
  an	
  individual	
  will	
  continue	
  to	
  exhibit	
  the	
  same	
  behaviors	
  over	
  
time,	
  uncertainty	
  arises	
  in	
  the	
  likelihood	
  of	
  those	
  payoffs	
  actually	
  occurring	
  at	
  the	
  expected	
  
value	
  and	
  frequency.	
  	
  However,	
  the	
  expectation	
  of	
  the	
  provision	
  of	
  those	
  payoffs	
  over	
  the	
  
course	
  of	
  the	
  relationship	
  serves	
  as	
  the	
  individual’s	
  reference	
  point.	
  If	
  an	
  individual’s	
  
prospective	
  partner	
  proves	
  over	
  time	
  to	
  behave	
  unreliably,	
  the	
  individual	
  will	
  decide	
  
against	
  pursuing	
  the	
  marriage	
  because	
  of	
  loss	
  aversion.	
  In	
  other	
  words,	
  the	
  prospect	
  of	
  
uncertainty	
  in	
  receiving	
  the	
  full	
  value	
  of	
  the	
  expected	
  benefits	
  from	
  the	
  potential	
  marriage,	
  
places	
  the	
  individual	
  in	
  the	
  loss	
  frame.	
  And	
  because	
  individuals	
  are	
  loss	
  averse,	
  he	
  or	
  she	
  
would	
  choose	
  to	
  remain	
  single.	
  	
  The	
  value	
  function	
  illustrates	
  loss	
  aversion	
  through	
  the	
  
convexity	
  and	
  relative	
  steepness	
  of	
  the	
  function	
  around	
  the	
  reference	
  point	
  in	
  the	
  loss	
  
frame.	
  	
  
	
  
ROLE	
  OF	
  ENDOWMENT	
  EFFECTS	
  &	
  SUNK	
  COSTS	
  IN	
  MARRIAGE	
  DECISIONS	
  
	
  
The	
  endowment	
  effect	
  presumes	
  that	
  when	
  individuals	
  attain	
  possession	
  of	
  something,	
  they	
  
will	
  attach	
  a	
  higher	
  value	
  to	
  that	
  thing	
  simply	
  because	
  it	
  belongs	
  to	
  them.	
  In	
  context	
  of	
  
marriage,	
  once	
  two	
  individuals	
  become	
  husband	
  and	
  wife,	
  they	
  both	
  tend	
  to	
  overstate	
  the	
  
value	
  of	
  the	
  relationship	
  simply	
  because	
  the	
  marriage	
  is	
  unique	
  to	
  them.	
  	
  The	
  endowment	
  
effect	
  is	
  irrational	
  according	
  to	
  standard	
  economic	
  theory	
  because	
  the	
  inflated	
  value	
  
assigned	
  to	
  the	
  relationship	
  is	
  baseless,	
  and	
  will	
  result	
  in	
  sub-­‐optimal	
  marital	
  outcomes.	
  The	
  
presence	
  of	
  the	
  endowment	
  effect	
  has	
  profound	
  consequences	
  on	
  decisions	
  relating	
  to	
  
continuing	
  or	
  ending	
  a	
  marriage.	
  Even	
  in	
  the	
  case	
  in	
  which	
  both	
  individuals	
  are	
  unhappy	
  
with	
  their	
  marriage,	
  and	
  are	
  thus	
  receiving	
  negative	
  payoffs	
  from	
  its	
  persistence,	
  the	
  
decision	
  to	
  continue	
  a	
  marriage	
  is	
  strongly	
  influenced	
  by	
  endowment	
  effect,	
  which	
  frames	
  
the	
  decision	
  in	
  terms	
  of	
  loss.	
  As	
  a	
  result,	
  when	
  evaluating	
  this	
  decision,	
  individuals	
  assign	
  an	
  
overstated	
  value	
  to	
  a	
  prospective	
  gamble	
  that	
  includes	
  a	
  possibility	
  of	
  improved	
  marriage	
  
conditions	
  in	
  the	
  future.	
  They	
  will	
  then	
  compare	
  their	
  assessment	
  of	
  the	
  gamble	
  to	
  the	
  value	
  
of	
  divorce,	
  which	
  is	
  a	
  certain	
  outcome	
  with	
  definite	
  payoffs.	
  But,	
  because	
  individuals	
  are	
  loss	
  
averse	
  by	
  nature	
  and	
  value	
  endowment,	
  they	
  will	
  assign	
  an	
  inflated	
  relative	
  value	
  to	
  the	
  
prospect	
  of	
  continuing	
  the	
  marriage	
  in	
  hopes	
  of	
  better	
  outcomes	
  in	
  the	
  future.	
  In	
  the	
  same	
  
way,	
  individuals	
  facing	
  this	
  decision	
  further	
  constrain	
  themselves	
  to	
  suboptimal	
  outcomes	
  
by	
  assigning	
  values	
  to	
  sunk	
  costs.	
  Sunk	
  costs	
  are	
  commonly	
  defined	
  in	
  economics	
  as	
  costs	
  
that	
  have	
  already	
  been	
  incurred,	
  and	
  which	
  cannot	
  be	
  recovered.	
  The	
  fact	
  that	
  these	
  costs	
  
have	
  no	
  salvage	
  value	
  means	
  that	
  individuals	
  should	
  not	
  consider	
  them	
  when	
  facing	
  present	
  
decisions.	
  Rational	
  individuals	
  facing	
  a	
  decision	
  will	
  use	
  marginal	
  analysis	
  to	
  weigh	
  their	
  
decision.	
  However,	
  empirical	
  evidence	
  reveals	
  the	
  tendency	
  of	
  economic	
  agents	
  to	
  factor	
  
sunk	
  costs	
  into	
  their	
  decision	
  mechanisms.	
  	
  In	
  relation	
  to	
  the	
  topic	
  of	
  marriage,	
  individuals	
  
will	
  consider	
  their	
  historical	
  investment	
  of	
  time	
  and	
  energy	
  in	
  making	
  subsequent	
  marital	
  
decisions,	
  even	
  though	
  these	
  are	
  sunk	
  costs	
  and	
  should	
  not	
  influence	
  present	
  decisions	
  (1).	
  	
  
The	
  behavioral	
  implications	
  of	
  the	
  endowment	
  and	
  sunk	
  cost	
  effects	
  are	
  that	
  individuals	
  will	
  
be	
  more	
  likely	
  continue	
  a	
  marriage	
  even	
  if	
  it	
  brings	
  them	
  some	
  level	
  of	
  disutility,	
  which	
  will	
  
predict	
  the	
  presence	
  of	
  more	
  unhappy	
  couples	
  and	
  high	
  psychological	
  costs	
  for	
  individuals	
  
subject	
  to	
  these	
  conditions.	
  
	
  
EFFECTS	
  OF	
  TIME-­‐INCONSISTENT	
  PREFERENCES	
  ON	
  MARRIAGE	
  STABILITY	
  
	
  
Even	
  if	
  the	
  expected	
  payoffs	
  received	
  from	
  the	
  other	
  individual	
  in	
  the	
  marital	
  arrangement	
  
are	
  certain,	
  an	
  individual’s	
  valuation	
  of	
  these	
  payoffs	
  may	
  change	
  in	
  unpredictable	
  ways,	
  
and	
  so	
  the	
  payoffs	
  may	
  be	
  valued	
  either	
  more	
  or	
  less	
  in	
  different	
  time	
  periods.	
  This	
  is	
  
because	
  individuals	
  have	
  time-­‐	
  inconsistent	
  preferences,	
  meaning	
  people’s	
  tastes	
  and	
  
economic	
  attitudes	
  change	
  as	
  time	
  elapses	
  in	
  complex	
  ways	
  that	
  are	
  difficult	
  to	
  model.	
  	
  
Individuals	
  will	
  take	
  on	
  different	
  consumption	
  and	
  saving	
  patterns,	
  attitudes	
  towards	
  risk,	
  
preferences	
  for	
  certain	
  qualities,	
  and	
  will	
  receive	
  utility	
  from	
  different	
  things	
  at	
  different	
  
points	
  in	
  time.	
  Standard	
  economic	
  theory	
  examines	
  how	
  individuals	
  evaluate	
  intertemporal	
  
choices,	
  or	
  decisions	
  that	
  involve	
  the	
  individual	
  trading	
  off	
  benefits	
  and	
  costs	
  in	
  different	
  
time	
  periods,	
  using	
  the	
  Discounted	
  Utility	
  Model.	
  The	
  model	
  assumes	
  that	
  people	
  evaluate	
  
intertemporal	
  choices	
  by	
  exponentially	
  discounting	
  future	
  “pleasures”	
  and	
  “pains”	
  resulting	
  
from	
  the	
  present	
  choice.	
  Economic	
  agents	
  discount	
  in	
  order	
  to	
  better	
  appraise	
  future	
  
outcomes	
  by	
  quantifying	
  them	
  in	
  present	
  terms.	
  The	
  use	
  of	
  exponential	
  discounting	
  in	
  
evaluating	
  how	
  a	
  present	
  decision	
  that	
  involves	
  trading	
  off	
  benefits	
  and	
  costs	
  in	
  the	
  future,	
  
would	
  be	
  a	
  good	
  predictor	
  of	
  economic	
  decision	
  if	
  individuals	
  had	
  the	
  propensity	
  to	
  make	
  
dynamically	
  consistent	
  choices,	
  as	
  suggested	
  by	
  rational	
  choice	
  theory.	
  We	
  know	
  from	
  
empirical	
  economic	
  analysis	
  and	
  behavioral	
  studies	
  that	
  this	
  theory	
  cannot	
  accurately	
  
predict	
  individual	
  behavior.	
  	
  Marriage	
  is	
  one	
  of	
  the	
  highest	
  stake	
  intertemporal	
  choices	
  that	
  
most	
  individuals	
  will	
  have	
  to	
  make	
  in	
  their	
  life,	
  because	
  in	
  theory,	
  it	
  involves	
  a	
  lifetime	
  
commitment	
  to	
  another	
  individual,	
  involves	
  sacrificing	
  independence,	
  usually	
  implies	
  
raising	
  a	
  child,	
  and	
  ultimately	
  results	
  in	
  trading-­‐off	
  self-­‐interest.	
  Thus,	
  an	
  individual	
  facing	
  a	
  
present	
  decision	
  to	
  get	
  married	
  faces	
  a	
  great	
  deal	
  of	
  uncertainty;	
  and	
  while	
  there	
  are	
  future	
  
benefits	
  too,	
  those	
  are	
  uncertain	
  as	
  well.	
  	
  Human	
  behavior	
  is	
  complex	
  and	
  can	
  oftentimes	
  be	
  
unpredictable,	
  so	
  reducing	
  the	
  human	
  decision	
  making	
  process	
  to	
  a	
  simple	
  exponential	
  time	
  
discounting	
  factor	
  tells	
  us	
  little,	
  if	
  anything	
  at	
  all,	
  about	
  how	
  individuals	
  think	
  about	
  
intertemporal	
  choices.	
  Time-­‐inconsistent	
  models	
  of	
  intertemporal	
  choice	
  theory	
  have	
  been	
  
developed	
  to	
  more	
  accurately	
  reflect	
  human	
  rationale	
  and	
  time	
  preferences.	
  Such	
  models	
  
show	
  that	
  individuals	
  have	
  a	
  strongly	
  biased	
  preference	
  for	
  present	
  consumption,	
  and	
  that	
  
they	
  more	
  closely	
  use	
  hyperbolic	
  discounting	
  to	
  make	
  choices	
  involving	
  future	
  outcomes.	
  
Hyperbolic	
  discounting	
  implies	
  that	
  individuals	
  have	
  a	
  strong	
  time	
  preference	
  for	
  the	
  
present,	
  and	
  that	
  subsequent	
  near	
  future	
  periods	
  are	
  much	
  more	
  heavily	
  discounted	
  than	
  
periods	
  further	
  in	
  the	
  future.	
  This	
  means	
  that	
  if	
  individuals	
  make	
  that	
  choices	
  that	
  involve	
  
delayed	
  outcomes,	
  valuations	
  of	
  those	
  outcomes	
  will	
  decrease	
  more	
  rapidly	
  in	
  periods	
  
closer	
  to	
  the	
  choice,	
  and	
  the	
  rate	
  of	
  decrease	
  will	
  diminish	
  as	
  time	
  moves	
  further	
  out.	
  	
  Time-­‐
inconsistent	
  models	
  suggest	
  that	
  we	
  do	
  not	
  have	
  the	
  cognitive	
  resources	
  to	
  understand	
  
what	
  our	
  preferences	
  will	
  be	
  as	
  we	
  look	
  further	
  out	
  into	
  the	
  future.	
  These	
  models	
  are	
  
consistent	
  with,	
  and	
  help	
  explain	
  the	
  presence	
  preference	
  reversals	
  that	
  commonly	
  occur	
  
when	
  we	
  make	
  intertemporal	
  choices.	
  In	
  terms	
  of	
  marriage,	
  time-­‐inconsistent	
  models	
  
provide	
  descriptive	
  insight	
  into	
  how	
  present-­‐bias	
  might	
  lead	
  individuals	
  to	
  impulsively	
  
engage	
  into	
  a	
  marital	
  arrangement,	
  and	
  explain	
  how	
  and	
  why	
  the	
  value	
  of	
  a	
  marriage	
  to	
  an	
  
individual	
  might	
  change	
  over	
  time.	
  Time-­‐inconsistent	
  models	
  may	
  additionally	
  have	
  
normative	
  implications:	
  if	
  individuals	
  can	
  better	
  understand	
  how	
  they	
  make	
  choices,	
  and	
  
better	
  understand	
  the	
  uncertainties	
  they	
  face,	
  they	
  might	
  be	
  subject	
  to	
  less	
  error	
  in	
  their	
  
judgments.	
  In	
  the	
  case	
  of	
  marriage,	
  understanding	
  intertemporal	
  choice	
  might	
  influence	
  
individuals	
  take	
  more	
  of	
  a	
  long-­‐term	
  view	
  in	
  assessing	
  the	
  decision	
  to	
  get	
  married.	
  Married	
  
couples	
  might	
  even	
  elect	
  to	
  implement	
  self-­‐control	
  and	
  commitment	
  devices	
  to	
  mitigate	
  
future	
  preference	
  reversals	
  in	
  order	
  to	
  maintain	
  a	
  healthier	
  longer-­‐term	
  relationship.	
  	
  	
  
	
  
USING	
  GAME	
  THEORY	
  TO	
  SUSTAIN	
  COMPATIBILITY	
  IN	
  MARRIAGE	
  
	
  
If	
  the	
  marriage	
  market	
  operated	
  perfectly,	
  the	
  optimal	
  sorting	
  of	
  individuals	
  in	
  the	
  market	
  
would	
  take	
  place.	
  As	
  mentioned	
  earlier,	
  the	
  underlying	
  assumptions	
  for	
  a	
  truly	
  efficient	
  
market	
  presumes	
  that	
  individuals	
  have	
  time-­‐consistent	
  rank	
  ordered	
  preferences,	
  and	
  
optimize	
  their	
  outcomes	
  through	
  the	
  use	
  of	
  perfect	
  information.	
  Optimal	
  sorting	
  would	
  
mean	
  that	
  individuals	
  would	
  select	
  partners	
  whose	
  characteristics	
  exactly	
  meet	
  their	
  pre-­‐
defined	
  preferences.	
  If	
  this	
  occurred,	
  marriage	
  outcomes	
  would	
  be	
  maximized	
  and	
  
individuals	
  would	
  be	
  perfectly	
  compatible.	
  	
  Under	
  the	
  assumption	
  that	
  individuals	
  in	
  a	
  
marriage	
  would	
  be	
  perfectly	
  compatible,	
  one	
  could	
  further	
  infer	
  that	
  this	
  means	
  that	
  they	
  
would	
  not	
  substitute	
  out	
  any	
  of	
  their	
  partner’s	
  characteristics,	
  given	
  the	
  opportunity.	
  
Further,	
  if	
  that	
  assumption	
  held,	
  it	
  is	
  likely	
  that	
  married	
  couples	
  would	
  have	
  no	
  propensity	
  
to	
  ever	
  disagree.	
  	
  However,	
  we	
  know	
  that	
  this	
  is	
  certainly	
  not	
  the	
  case	
  in	
  the	
  real	
  world.	
  	
  The	
  
cognitive	
  limitations,	
  simplifying	
  heuristics,	
  systematic	
  biases,	
  and	
  models	
  of	
  observable	
  
human	
  decision	
  mechanisms	
  discussed	
  earlier	
  reveal	
  the	
  inability	
  of	
  individuals	
  to	
  optimize,	
  
especially	
  in	
  intertemporal	
  choice	
  decisions	
  such	
  as	
  marriage.	
  	
  Therefore,	
  when	
  individuals	
  
enter	
  into	
  a	
  marital	
  arrangement,	
  they	
  must	
  strive	
  to	
  achieve	
  compatibility.	
  This	
  however,	
  is	
  
difficult	
  given	
  that	
  married	
  individuals	
  almost	
  inevitably	
  have	
  different	
  ways	
  of	
  viewing	
  the	
  
world,	
  and	
  thus	
  making	
  decisions.	
  It	
  is	
  difficult	
  enough	
  for	
  an	
  individual	
  achieve	
  desirable	
  
outcomes	
  when	
  facing	
  complex	
  choices,	
  and	
  thus	
  even	
  more	
  complicated	
  when	
  two	
  
individuals	
  attempt	
  to	
  optimize	
  their	
  joint	
  outcomes.	
  	
  Behavioral	
  Game	
  Theory	
  examines	
  
how	
  two	
  or	
  more	
  individuals	
  will	
  each	
  attempt	
  to	
  achieve	
  the	
  best	
  outcomes,	
  but	
  are	
  subject	
  
to	
  the	
  interdependency	
  of	
  one	
  another’s	
  choices.	
  	
  Married	
  couples	
  face	
  game-­‐theory	
  
dilemmas	
  every	
  single	
  day;	
  the	
  success	
  they	
  have	
  in	
  cooperating	
  with	
  one	
  another	
  will	
  
determine	
  the	
  outcome	
  of	
  their	
  marriage.	
  The	
  “Battle	
  of	
  the	
  sexes”	
  game	
  demonstrates	
  
decision	
  situations	
  married	
  couples	
  face	
  regularly.	
  The	
  game	
  considers	
  a	
  married	
  couple	
  
that	
  hopes	
  to	
  spend	
  a	
  Friday	
  night	
  together,	
  and	
  will	
  receive	
  utility	
  from	
  doing	
  so,	
  and	
  no	
  
utility	
  if	
  they	
  do	
  not.	
  The	
  dilemma	
  arises	
  from	
  the	
  fact	
  that	
  the	
  husband	
  wishes	
  to	
  go	
  see	
  a	
  
boxing	
  match,	
  whereas	
  the	
  wife	
  wishes	
  to	
  go	
  see	
  a	
  ballet.	
  The	
  husband	
  gets	
  a	
  higher	
  payoff	
  
from	
  going	
  to	
  the	
  boxing	
  match,	
  and	
  the	
  wife	
  receives	
  the	
  same	
  payoff	
  if	
  she	
  attends	
  the	
  
ballet;	
  and	
  in	
  the	
  event	
  that	
  one	
  of	
  them	
  cooperates,	
  only	
  one	
  of	
  them	
  will	
  actually	
  receive	
  
utility	
  from	
  the	
  entertainment	
  source,	
  and	
  the	
  other	
  will	
  only	
  receive	
  utility	
  from	
  spending	
  
time	
  together.	
  The	
  natural	
  solution	
  is	
  that	
  the	
  couple	
  will	
  spend	
  their	
  Friday	
  night	
  apart,	
  and	
  
will	
  both	
  end	
  up	
  receiving	
  no	
  utility.	
  The	
  best	
  possible	
  outcome	
  would	
  involve	
  either	
  the	
  
husband	
  cooperating	
  with	
  the	
  wife	
  by	
  going	
  to	
  the	
  ballet,	
  or	
  conversely,	
  the	
  wife	
  
cooperating	
  with	
  the	
  husband	
  by	
  going	
  to	
  the	
  boxing	
  match.	
  Subsequently,	
  the	
  couple	
  
should	
  impose	
  a	
  commitment	
  mechanism	
  to	
  ensure	
  that	
  next	
  time	
  a	
  similar	
  dilemma	
  arises;	
  
the	
  roles	
  are	
  reversed	
  so	
  as	
  to	
  normalize	
  payoffs	
  over	
  the	
  course	
  of	
  the	
  relationship.	
  	
  If	
  
married	
  couples	
  can	
  understand	
  the	
  intuition	
  behind	
  how	
  they	
  make	
  interdependent	
  
decisions,	
  they	
  will	
  comprehend	
  that	
  even	
  though	
  oftentimes	
  the	
  “non-­‐cooperative”	
  strategy	
  
appears	
  more	
  attractive,	
  choosing	
  “cooperative”	
  strategies	
  will	
  result	
  in	
  greater	
  payoffs,	
  and	
  
thus	
  a	
  more	
  compatible	
  marriage	
  in	
  the	
  long	
  run.	
  	
  
	
  
	
  
References:	
  	
  
	
  
1. Marriage Paradoxes, Bruno S. Frey & Reiner Eichenberger, Rationality and Society May
1996 8: 187-206.
2. A Theory of Marriage, Gary S. Becker. Economics of the Family: Marriage, Children, and
Human Capital, 1974
3. Prospect Theory and Marriage Decisions, Anastasia Bogdanova. Department of Economics,
Duke University, 2012
4. Judgment under Uncertainty: Heuristics and Biases, Amos Tversky; Daniel Kahneman.
Science, New Series, Vol. 185, No. 4157. (Sep. 27, 1974), pp. 1124-1131.
5. Prospect Theory: An Analysis of Decision under Risk, Daniel Kahneman and Amos Tversky.
Econometrica, 47(2), pp. 263-291, March 1979

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Behavioral Economics & Marriage Decisions

  • 1. Logan  Burnett   Professor  Sheffrin   Behavioral  Economics   28  November  2015     Behavioral  Economics  in  Analyzing  Marriage  Decisions  &  Creating  Better  Outcomes       ABSTRACT     Marriage  is  an  economic  arrangement  just  as  much  as  it  is  an  intimate  relationship.  There   are  both  financial  costs  and  economic  tradeoffs  that  individuals  experience  in  their  decision   to  marry.  There  are  also  economic  benefits  that  incentivize  an  individual’s  pursuit  of  such  a   commitment.  Individual  decisions  to  marry  also  have  significant  external  economic  effects   on  population  growth,  consumption  of  scarce  resources,  distributive  allocations  of  goods   and  services,  labor-­‐force  participation  of  women,  and  litigation  costs.  Marriage  is  most   commonly  defined  as  “the  legally  recognized  union  between  two  individuals.”    Individuals   make  the  decision  to  engage  in  a  marital  relationship  for  a  variety  of  reasons,  including   psychological  commitment,  division  of  household  labor,  and  for  creating  stable   environments  for  raising  children.  However,  it  would  only  make  sense  for  two  individuals  to   marry  one  another  if  they  each  expect  to  be  better  off  from  the  arrangement.  In  standard   economic  terms,  a  marriage  will  occur  only  under  the  condition  that  there  is  an  expected  or   experienced  gain  in  utility  for  each  individual.     This  analysis  will  focus  on  the  most  common  type  of  marital  arrangement,  one  between   male  and  female.  Beyond  the  nature  of  marriage  having  economic  implications,  economic   frameworks  can  demonstrate  how  individuals  choose  their  life  partners,  how  they  manage   their  relationships,  and  provide  insight  into  why  many  marriages  paradoxically  diminish   subjective  well-­‐being,  and  thus  commonly  end  in  divorce.    Each  individual  in  a  marital   arrangement  has  a  set  of  characteristics,  as  well  as  a  set  of  preferences  for  the   characteristics  of  a  potential  partner.  These  individual  traits,  and  the  desire  for  specific   qualities  vary  across  individuals,  and  may  include  factors  like  attractiveness,  intelligence,   education,  income,  demographic  properties,  and  personality  characteristics.  This  analysis   will  start  off  by  examining  the  costs  and  benefits  of  marrying  at  the  individual  level.  Next,   this  paper  will  analyze  the  marriage  decisions  through  traditional  economic  theories  of   choice.  Then,  concepts  from  behavioral  economics  will  be  applied  to  refine  and  expand   models  of  choice  in  order  to  provide  a  more  realistic  understanding  of  how  individuals   evaluate  marital  decisions;  and  will  offer  explanations  to  common  outcomes  surrounding   marriage.  This  analysis  will  also  demonstrate  the  normative  value  of  using  behavioral   economic  applications  and  models  for  fostering  improved  marital  outcomes  at  the   individual  and  institutional  level.       THE  MARKET  FOR  MARRIAGE  AND  THE  DECISION  TO  MARRY  UNDER  EUT     In  the  same  way  that  all  standard  economic  decisions  can  be  thought  of  and  rationalized  in   terms  of  opportunity  costs,  the  decision  to  engage  in  a  marriage  involves  an  individual   foregoing  the  benefits  of  being  single.  In  his  early  economic  analysis  of  the  family  Gary  
  • 2. Becker  surmised  that  the  utility  received  from  either  being  single  or  married  could  be   described  in  terms  of  benefits  and  costs  that  involve  payoffs  to  the  individual  (2).  The   positive  payoffs  from  being  single  can  either  result  from  relatively  more  personal  living   space,  greater  independence,  and  more  leisure  time.  The  benefits  arising  from  marriage   include  commitment  and  amorousness,  joint  production  capabilities  such  as  conceiving   child,  and  economies  of  scale  in  producing  household  commodities.  (2).    Furthermore,  the   decision  to  marry  is  complex  and  involves  a  great  deal  of  uncertainty  related  to  long-­‐term   compatibility,  financial  stability,  and  exogenous  events  that  can  change  the  nature  of  a   relationship.  The  uncertainty  is  enhanced  by  the  fact  that  individuals  must  base  their   decision  on  current,  and  usually  limited  information  about  one  another,  as  well  as   expectations  about  the  future  related  to  income,  and  limitations  on  self-­‐indulgence,  etc.   Thus,  standard  economic  framework  has  been  applied  for  modeling  marital  decisions,   although  there  are  many  shortcomings.  The  most  widely  used  model  of  decision-­‐making   under  risk  or  uncertainty  is  derived  from  the  Expected  Utility  Theory.  Neo-­‐Classical   Economics  ascertains  that  this  model  can  accurately  describe  economic  behavior,  and  so  it   can  also  serve  to  be  the  normative  model  of  rational  choice.    There  are  two  main   assumptions  underlying  Expected  Utility  Theory:  First,  individuals  are  motivated  by  utility   maximization;  and  second,  economic  actor’s  utility  maximization  desires  are  administered   purely  by  self-­‐interest.    Additional  considerations  involve  the  assumption  that  individuals   have  well-­‐defined,  rank  ordered  preferences,  and  these  individuals  have  perfect  information   regarding  their  choices  and  of  the  relevant  alternatives.  The  problem  with  this  model  of   rational  choice  is  that  economic  agents  are  humans,  and  humans  have  cognitive  limitations.   In  other  words,  individuals  have  a  finite  capacity  for  understanding  information  and   subsequently  choosing  among  alternatives.    In  the  real  word,  economic  agents  will  attempt   to  reduce  uncertainty  by  seeking  out  information.  They  will  do  this  until  the  marginal  search   costs  exceed  the  marginal  benefits  of  additional  information,  not  until  they  perfectly   understand  all  relevant  information.  As  a  result,  economic  agents  will  use  heuristics  to   simplify  their  decisions  in  the  face  of  complexity  and  uncertainty.  Use  of  such  simplifying   mechanisms  leads  to  systematic  and  predictable  biases,  which  in  turn  often  produces   suboptimal  outcomes  (4).    The  “representativeness  heuristic”  is  relevant  in  marital  choice   theory  in  that  prospective  couples  view  their  relationship  as  unique,  and  thus  do  not  believe   that  their  relationship  is  representative  of  the  average  couple.  The  result  is  that  the  couple  is   insensitive  to  the  fairly  high  probability  that  their  marriage  will  result  in  divorce.   Individuals  are  also  subject  to  basing  their  decisions  on  the  ease  by  which  they  can  access   information  about  outcomes  and  probabilities.  This  phenomenon  is  known  as  the   “availability  heuristic”,  and  its  use  can  also  lead  to  systematic  errors  in  probability   evaluation.  Thus,  individuals  may  base  their  decision  to  marry  on  inaccurate  assessments  of   probabilities.         EMPIRACALLY  PROVEN  FAILURES  IN  THE  MARKET  FOR  MARRIAGE       A  market  is  an  economic  structure  whereby  economic  actors  seek  to  maximize  their   individual  outcomes  through  trading  scarce  resources.  Markets,  if  they  are  efficient  will   achieve  the  optimal  allocation  of  resources,  which  in  turn  leads  to  the  maximization  of   individual  satisfaction,  societal  enrichment,  and  economic  growth.    No  real-­‐world  market  is   perfectly  efficient  due  to  the  presence  of  simplifying  assumptions,  which  cannot  
  • 3. wholesomely  quantify  the  complexities  of  the  world.  Thus,  all  markets  fail  in  one  way  or   another.    Even  marital  decisions  can  be  analyzed  by  applying  market  principles.  The   ‘marriage  market’  however,  fails  in  number  of  ways,  which  can  help  to  explain  why  so  many   individuals  make  sub-­‐optimal  marital  decisions.    First  of  all,  open  market  access  is  not   possible,  and  the  result  is  that  the  market  for  marriage  is  extremely  segmented  (1).  This  is   because  it  is  impossible  for  a  given  individual  to  access  to  everybody  in  the  world,    and   equally  as  impossible  for  an  individual  to  have  perfect  information  about  every  market   participant.  There  are  also  particularly  high  search  costs  in  the  marriage  market.   Furthermore,  the  marginal  benefits  of  information  are  low  due  to  the  overwhelming   presence  of  asymmetric  information,  and  the  costs  of  attaining  the  information  are  high  in   the  first  place  (1).  Because  information  gathered  about  a  potential  partner  at  the  evaluation   stage  is  of  limited  value,  individuals  do  not  devotedly  search  for  the  partner  that  perfectly   matches  their  preferences,  and  thus  conform  to  the  model  of  bounded  rationality.  (1).  In  the   same  way,  because  actors  in  the  marriage  market  have  cognitive  limitations,  they  will   satisfice  in  order  to  simplify  their  decision.  Also,  over  the  course  of  one’s  life,  individuals   might  change  their  preferences  in  respect  to  the  characteristics  they  desire  their  spouse  to   have,  or  about  the  type  of  relationship  they  wish  to  be  in.  The  choice  mechanisms   individuals  use  to  find  a  partner  demonstrate  how  individual  actors  search  for  a  partner,   and  offers  explanations  for  the  wide  presence  of  suboptimal  marital  outcomes  in  the  real   world.       USING  PROSPECT  THEORY  FOR  EVALUATING  MARITAL  DECISIONS     It  is  critical  that  when  considering  marriage,  individuals  use  the  most  refined  and  practical   decision  mechanism,  as  making  the  wrong  choice  in  this  context  can  be  extremely  costly   financially,  psychologically,  and  temporally.  The  problem  with  using  expected  utility  theory   in  evaluating  whether  to  get  marred  or  not,  lies  in  the  fact  that  individuals  often  do  not  act  in   accordance  with  the  theory  when  faced  with  real  world  decisions.  This  is  because  expected   utility  theory  does  not  consider  how  individuals  frame  decisions  in  true  behavioral  settings.     Because  individuals  are  faced  with  uncertainty  in  decision  making,  and  do  not  have  the   cognitive  capacity  to  perfectly  understand  all  relevant  information,  they  will  often  use   heuristics  and  available  information  to  frame  the  decision  in  such  a  way  that  they  are  best   able  to  consider  the  possible  outcomes,  and  the  value  of  those  outcomes  in  the  choice   decision.  A  decision’s  frame  alone  can  cause  an  individual  to  reverse  his  or  her  preferences   without  actually  changing  the  outcomes  of  the  choices  themselves.  This  empirically  proved   fact,  known  as  the  Allais  Paradox,  does  not  coincide  with  rational  choice  theory;  whereby   individuals  will  maximize  their  utility  irrespective  of  how  a  decision  is  presented  to  them.     Prospect  theory  accounts  for  the  widely  observed  behavioral  tendencies  that  economic   agents  display  in  real  world  decision  settings,  but  that  are  not  included  in  the  traditional   description  of  the  “Economic  Man”.  Prospect  Theory  therefore  might  offer  a  more  realistic   and  applicable  model  of  choice  for  individuals  considering  marriage.    In  the  first  phase  of   Prospect  Theory,  referred  to  as  the  Editing  Phase,  individuals  will  simplify  the  choice   decision  by  identifying  possible  outcomes,  and  establishing  a  reference  point  to  which  they   can  assess  the  value  of  those  possible  outcomes.  Prospect  theory  suggests  that  individuals   evaluate  decisions  in  terms  of  gains  and  losses  relative  to  a  reference  point,  rather  than  in   terms  of  change  in  absolute  levels  of  wealth,  as  would  be  the  case  under  the  standard  model.  
  • 4. Prospect  theory’s  value  function  differs  from  the  utility  function  in  that  it  accounts  for  the   fact  that  people  are  loss  averse,  and  consequently  risk-­‐loving  when  they  are  in  a  loss  frame.     In  the  second  phase  of  prospect  theory,  the  individual  will  evaluate  prospects  by  assigning   decision  weights,  based  on  subjectively  assessed  probabilities,  to  the  values  of  possible   outcomes.    These  decision  weights  essentially  measure  the  individuals  forecast  about  the   chance  of  an  event  occurring.    The  weighting  function  reflects  the  tendencies  of  individuals   to  overweight  the  likelihood  of  unlikely  extreme  outcomes.  This  framework  is  carefully   crafted  around  observable  and  empirically  proven  behavioral  tendencies,  and  consequently   adjusts  economic  models  to  reflect  psychological  processes.  Prospect  theory  can  therefore   be  of  useful  in  understanding  how  individuals  assess  potential  partners,  why  individuals   initially  decide  to  enter  a  marriage,  and  how  agents  in  a  marital  relationship  make  decisions   about  whether  to  continue  a  marriage  or  get  a  divorce.  (3).       PROSPECT  THEORY  &  ROLE  OF  LOSS  AVERSION  IN  SELECTING  A  PARTNER     As  mentioned  earlier,  individuals  will  decide  to  get  married  if  they  find  a  partner  whose   unique  characteristics  provide  payoffs  that  would  deliver  them  more  value  than  remaining   single.  Under  prospect  theory,  people  will  assign  values  to  the  characteristics  of  a  potential   partner,  and  therefore  the  expected  benefits  they  hope  to  receive  from  them.  They  will  also   subjectively  assess  the  probability  that  those  qualities  will  result  in  gains  from  the  decision   to  marry.  If  individuals  assess  the  prospect  that  a  marriage  will  deliver  them  greater  value   than  their  current  welfare  state,  they  will  elect  to  engage  in  a  marriage.    Because  in  the  real   world  we  cannot  be  sure  that  an  individual  will  continue  to  exhibit  the  same  behaviors  over   time,  uncertainty  arises  in  the  likelihood  of  those  payoffs  actually  occurring  at  the  expected   value  and  frequency.    However,  the  expectation  of  the  provision  of  those  payoffs  over  the   course  of  the  relationship  serves  as  the  individual’s  reference  point.  If  an  individual’s   prospective  partner  proves  over  time  to  behave  unreliably,  the  individual  will  decide   against  pursuing  the  marriage  because  of  loss  aversion.  In  other  words,  the  prospect  of   uncertainty  in  receiving  the  full  value  of  the  expected  benefits  from  the  potential  marriage,   places  the  individual  in  the  loss  frame.  And  because  individuals  are  loss  averse,  he  or  she   would  choose  to  remain  single.    The  value  function  illustrates  loss  aversion  through  the   convexity  and  relative  steepness  of  the  function  around  the  reference  point  in  the  loss   frame.       ROLE  OF  ENDOWMENT  EFFECTS  &  SUNK  COSTS  IN  MARRIAGE  DECISIONS     The  endowment  effect  presumes  that  when  individuals  attain  possession  of  something,  they   will  attach  a  higher  value  to  that  thing  simply  because  it  belongs  to  them.  In  context  of   marriage,  once  two  individuals  become  husband  and  wife,  they  both  tend  to  overstate  the   value  of  the  relationship  simply  because  the  marriage  is  unique  to  them.    The  endowment   effect  is  irrational  according  to  standard  economic  theory  because  the  inflated  value   assigned  to  the  relationship  is  baseless,  and  will  result  in  sub-­‐optimal  marital  outcomes.  The   presence  of  the  endowment  effect  has  profound  consequences  on  decisions  relating  to   continuing  or  ending  a  marriage.  Even  in  the  case  in  which  both  individuals  are  unhappy   with  their  marriage,  and  are  thus  receiving  negative  payoffs  from  its  persistence,  the   decision  to  continue  a  marriage  is  strongly  influenced  by  endowment  effect,  which  frames  
  • 5. the  decision  in  terms  of  loss.  As  a  result,  when  evaluating  this  decision,  individuals  assign  an   overstated  value  to  a  prospective  gamble  that  includes  a  possibility  of  improved  marriage   conditions  in  the  future.  They  will  then  compare  their  assessment  of  the  gamble  to  the  value   of  divorce,  which  is  a  certain  outcome  with  definite  payoffs.  But,  because  individuals  are  loss   averse  by  nature  and  value  endowment,  they  will  assign  an  inflated  relative  value  to  the   prospect  of  continuing  the  marriage  in  hopes  of  better  outcomes  in  the  future.  In  the  same   way,  individuals  facing  this  decision  further  constrain  themselves  to  suboptimal  outcomes   by  assigning  values  to  sunk  costs.  Sunk  costs  are  commonly  defined  in  economics  as  costs   that  have  already  been  incurred,  and  which  cannot  be  recovered.  The  fact  that  these  costs   have  no  salvage  value  means  that  individuals  should  not  consider  them  when  facing  present   decisions.  Rational  individuals  facing  a  decision  will  use  marginal  analysis  to  weigh  their   decision.  However,  empirical  evidence  reveals  the  tendency  of  economic  agents  to  factor   sunk  costs  into  their  decision  mechanisms.    In  relation  to  the  topic  of  marriage,  individuals   will  consider  their  historical  investment  of  time  and  energy  in  making  subsequent  marital   decisions,  even  though  these  are  sunk  costs  and  should  not  influence  present  decisions  (1).     The  behavioral  implications  of  the  endowment  and  sunk  cost  effects  are  that  individuals  will   be  more  likely  continue  a  marriage  even  if  it  brings  them  some  level  of  disutility,  which  will   predict  the  presence  of  more  unhappy  couples  and  high  psychological  costs  for  individuals   subject  to  these  conditions.     EFFECTS  OF  TIME-­‐INCONSISTENT  PREFERENCES  ON  MARRIAGE  STABILITY     Even  if  the  expected  payoffs  received  from  the  other  individual  in  the  marital  arrangement   are  certain,  an  individual’s  valuation  of  these  payoffs  may  change  in  unpredictable  ways,   and  so  the  payoffs  may  be  valued  either  more  or  less  in  different  time  periods.  This  is   because  individuals  have  time-­‐  inconsistent  preferences,  meaning  people’s  tastes  and   economic  attitudes  change  as  time  elapses  in  complex  ways  that  are  difficult  to  model.     Individuals  will  take  on  different  consumption  and  saving  patterns,  attitudes  towards  risk,   preferences  for  certain  qualities,  and  will  receive  utility  from  different  things  at  different   points  in  time.  Standard  economic  theory  examines  how  individuals  evaluate  intertemporal   choices,  or  decisions  that  involve  the  individual  trading  off  benefits  and  costs  in  different   time  periods,  using  the  Discounted  Utility  Model.  The  model  assumes  that  people  evaluate   intertemporal  choices  by  exponentially  discounting  future  “pleasures”  and  “pains”  resulting   from  the  present  choice.  Economic  agents  discount  in  order  to  better  appraise  future   outcomes  by  quantifying  them  in  present  terms.  The  use  of  exponential  discounting  in   evaluating  how  a  present  decision  that  involves  trading  off  benefits  and  costs  in  the  future,   would  be  a  good  predictor  of  economic  decision  if  individuals  had  the  propensity  to  make   dynamically  consistent  choices,  as  suggested  by  rational  choice  theory.  We  know  from   empirical  economic  analysis  and  behavioral  studies  that  this  theory  cannot  accurately   predict  individual  behavior.    Marriage  is  one  of  the  highest  stake  intertemporal  choices  that   most  individuals  will  have  to  make  in  their  life,  because  in  theory,  it  involves  a  lifetime   commitment  to  another  individual,  involves  sacrificing  independence,  usually  implies   raising  a  child,  and  ultimately  results  in  trading-­‐off  self-­‐interest.  Thus,  an  individual  facing  a   present  decision  to  get  married  faces  a  great  deal  of  uncertainty;  and  while  there  are  future   benefits  too,  those  are  uncertain  as  well.    Human  behavior  is  complex  and  can  oftentimes  be   unpredictable,  so  reducing  the  human  decision  making  process  to  a  simple  exponential  time  
  • 6. discounting  factor  tells  us  little,  if  anything  at  all,  about  how  individuals  think  about   intertemporal  choices.  Time-­‐inconsistent  models  of  intertemporal  choice  theory  have  been   developed  to  more  accurately  reflect  human  rationale  and  time  preferences.  Such  models   show  that  individuals  have  a  strongly  biased  preference  for  present  consumption,  and  that   they  more  closely  use  hyperbolic  discounting  to  make  choices  involving  future  outcomes.   Hyperbolic  discounting  implies  that  individuals  have  a  strong  time  preference  for  the   present,  and  that  subsequent  near  future  periods  are  much  more  heavily  discounted  than   periods  further  in  the  future.  This  means  that  if  individuals  make  that  choices  that  involve   delayed  outcomes,  valuations  of  those  outcomes  will  decrease  more  rapidly  in  periods   closer  to  the  choice,  and  the  rate  of  decrease  will  diminish  as  time  moves  further  out.    Time-­‐ inconsistent  models  suggest  that  we  do  not  have  the  cognitive  resources  to  understand   what  our  preferences  will  be  as  we  look  further  out  into  the  future.  These  models  are   consistent  with,  and  help  explain  the  presence  preference  reversals  that  commonly  occur   when  we  make  intertemporal  choices.  In  terms  of  marriage,  time-­‐inconsistent  models   provide  descriptive  insight  into  how  present-­‐bias  might  lead  individuals  to  impulsively   engage  into  a  marital  arrangement,  and  explain  how  and  why  the  value  of  a  marriage  to  an   individual  might  change  over  time.  Time-­‐inconsistent  models  may  additionally  have   normative  implications:  if  individuals  can  better  understand  how  they  make  choices,  and   better  understand  the  uncertainties  they  face,  they  might  be  subject  to  less  error  in  their   judgments.  In  the  case  of  marriage,  understanding  intertemporal  choice  might  influence   individuals  take  more  of  a  long-­‐term  view  in  assessing  the  decision  to  get  married.  Married   couples  might  even  elect  to  implement  self-­‐control  and  commitment  devices  to  mitigate   future  preference  reversals  in  order  to  maintain  a  healthier  longer-­‐term  relationship.         USING  GAME  THEORY  TO  SUSTAIN  COMPATIBILITY  IN  MARRIAGE     If  the  marriage  market  operated  perfectly,  the  optimal  sorting  of  individuals  in  the  market   would  take  place.  As  mentioned  earlier,  the  underlying  assumptions  for  a  truly  efficient   market  presumes  that  individuals  have  time-­‐consistent  rank  ordered  preferences,  and   optimize  their  outcomes  through  the  use  of  perfect  information.  Optimal  sorting  would   mean  that  individuals  would  select  partners  whose  characteristics  exactly  meet  their  pre-­‐ defined  preferences.  If  this  occurred,  marriage  outcomes  would  be  maximized  and   individuals  would  be  perfectly  compatible.    Under  the  assumption  that  individuals  in  a   marriage  would  be  perfectly  compatible,  one  could  further  infer  that  this  means  that  they   would  not  substitute  out  any  of  their  partner’s  characteristics,  given  the  opportunity.   Further,  if  that  assumption  held,  it  is  likely  that  married  couples  would  have  no  propensity   to  ever  disagree.    However,  we  know  that  this  is  certainly  not  the  case  in  the  real  world.    The   cognitive  limitations,  simplifying  heuristics,  systematic  biases,  and  models  of  observable   human  decision  mechanisms  discussed  earlier  reveal  the  inability  of  individuals  to  optimize,   especially  in  intertemporal  choice  decisions  such  as  marriage.    Therefore,  when  individuals   enter  into  a  marital  arrangement,  they  must  strive  to  achieve  compatibility.  This  however,  is   difficult  given  that  married  individuals  almost  inevitably  have  different  ways  of  viewing  the   world,  and  thus  making  decisions.  It  is  difficult  enough  for  an  individual  achieve  desirable   outcomes  when  facing  complex  choices,  and  thus  even  more  complicated  when  two   individuals  attempt  to  optimize  their  joint  outcomes.    Behavioral  Game  Theory  examines   how  two  or  more  individuals  will  each  attempt  to  achieve  the  best  outcomes,  but  are  subject  
  • 7. to  the  interdependency  of  one  another’s  choices.    Married  couples  face  game-­‐theory   dilemmas  every  single  day;  the  success  they  have  in  cooperating  with  one  another  will   determine  the  outcome  of  their  marriage.  The  “Battle  of  the  sexes”  game  demonstrates   decision  situations  married  couples  face  regularly.  The  game  considers  a  married  couple   that  hopes  to  spend  a  Friday  night  together,  and  will  receive  utility  from  doing  so,  and  no   utility  if  they  do  not.  The  dilemma  arises  from  the  fact  that  the  husband  wishes  to  go  see  a   boxing  match,  whereas  the  wife  wishes  to  go  see  a  ballet.  The  husband  gets  a  higher  payoff   from  going  to  the  boxing  match,  and  the  wife  receives  the  same  payoff  if  she  attends  the   ballet;  and  in  the  event  that  one  of  them  cooperates,  only  one  of  them  will  actually  receive   utility  from  the  entertainment  source,  and  the  other  will  only  receive  utility  from  spending   time  together.  The  natural  solution  is  that  the  couple  will  spend  their  Friday  night  apart,  and   will  both  end  up  receiving  no  utility.  The  best  possible  outcome  would  involve  either  the   husband  cooperating  with  the  wife  by  going  to  the  ballet,  or  conversely,  the  wife   cooperating  with  the  husband  by  going  to  the  boxing  match.  Subsequently,  the  couple   should  impose  a  commitment  mechanism  to  ensure  that  next  time  a  similar  dilemma  arises;   the  roles  are  reversed  so  as  to  normalize  payoffs  over  the  course  of  the  relationship.    If   married  couples  can  understand  the  intuition  behind  how  they  make  interdependent   decisions,  they  will  comprehend  that  even  though  oftentimes  the  “non-­‐cooperative”  strategy   appears  more  attractive,  choosing  “cooperative”  strategies  will  result  in  greater  payoffs,  and   thus  a  more  compatible  marriage  in  the  long  run.         References:       1. Marriage Paradoxes, Bruno S. Frey & Reiner Eichenberger, Rationality and Society May 1996 8: 187-206. 2. A Theory of Marriage, Gary S. Becker. Economics of the Family: Marriage, Children, and Human Capital, 1974 3. Prospect Theory and Marriage Decisions, Anastasia Bogdanova. Department of Economics, Duke University, 2012 4. Judgment under Uncertainty: Heuristics and Biases, Amos Tversky; Daniel Kahneman. Science, New Series, Vol. 185, No. 4157. (Sep. 27, 1974), pp. 1124-1131. 5. Prospect Theory: An Analysis of Decision under Risk, Daniel Kahneman and Amos Tversky. Econometrica, 47(2), pp. 263-291, March 1979