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Efficiency and Equity – Issues of Distributive Justice ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Possible reasons for government intervention ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Positive v Normative economics ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
At General Equilibrium 3 conditions hold: ,[object Object],[object Object],[object Object],[object Object]
Fundamental Theorems of Welfare Economics ,[object Object],[object Object],[object Object],[object Object],[object Object]
The Pareto Criterion ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
The Pareto Criterion ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Figure 10.4   Contract Curve a g Both a and g are on the contract curve -- we cannot rank these allocations using the Pareto rule!
[object Object],[object Object],[object Object],[object Object],0 Y e X e Y X
[object Object],0 Y e X e Y X ,[object Object],[object Object],[object Object]
0 Y e X e Y X ,[object Object],[object Object],[object Object]
Compensation & potential Pareto improvements   ,[object Object],[object Object],[object Object],[object Object],[object Object]
UPFs and SWFs ,[object Object],[object Object],[object Object],[object Object]
0 A Y X 0 B U B U A Edgeworth Consumption Box Utility possibility curve : derived by moving along the contract curve.   a b a b   ,[object Object],[object Object],[object Object]
[object Object],[object Object],0 Y e X e Y X 1 2
[object Object],[object Object],U B U A d 1 2 ,[object Object], ,[object Object],[object Object],[object Object],[object Object],g   e f  b 1 a 1 b 2 a 2
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],U B U A 2 1 But the UPC’s can intersect...  e f    d g ,[object Object]
U B U A The Utility Frontier ,[object Object],[object Object],[object Object],The movement from  a  to  b  represents a change in the two individuals’ utilities + a reallocation of resources with the output mix changing  b  a
Figure 10.9a   Welfare Maximization UPF c a b (a) Jane ’ s utility W 1 W 2 W 3 Denise’s utility Isowelfare curves: (similar to individual indifference curves)  summarise all the allocations with identical levels of welfare. Their shape reflect different views of society about distribution UPF: derived by moving along the contract curve.  Ordinal utility, so we cannot say how much    the curve slopes downwards but not at a definite rate
Figure 10.9a   Welfare maximization UPF c a (a) Jane ’ s utility W 1 W 2 Denise’s utility Y Assuming it is possible to construct this type of functions, this representation nicely illustrates the conflict between efficiency and equity X
Different approaches to distributive justice ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

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Welfareeconomics Efficiencyequity

  • 1.
  • 2.
  • 3.
  • 4.
  • 5.
  • 6.
  • 7.
  • 8. Figure 10.4 Contract Curve a g Both a and g are on the contract curve -- we cannot rank these allocations using the Pareto rule!
  • 9.
  • 10.
  • 11.
  • 12.
  • 13.
  • 14.
  • 15.
  • 16.
  • 17.
  • 18.
  • 19. Figure 10.9a Welfare Maximization UPF c a b (a) Jane ’ s utility W 1 W 2 W 3 Denise’s utility Isowelfare curves: (similar to individual indifference curves) summarise all the allocations with identical levels of welfare. Their shape reflect different views of society about distribution UPF: derived by moving along the contract curve. Ordinal utility, so we cannot say how much  the curve slopes downwards but not at a definite rate
  • 20. Figure 10.9a Welfare maximization UPF c a (a) Jane ’ s utility W 1 W 2 Denise’s utility Y Assuming it is possible to construct this type of functions, this representation nicely illustrates the conflict between efficiency and equity X
  • 21.