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Comportamient
o familiar y
opciones de
consumo
Elección familiar en los mercados de
producción
1. ¿Qué cantidad de producto, o conjunto de productos demandará?
2. ¿Qué cantidad de trabajo ofrecerá?
3. ¿Cuánto gastará el día de hoy y cuanto ahorrará para el futuro?
Recordemos los determinantes de la
demanda familiar
El precio del producto
El ingreso familiar disponible
La cantidad de riqueza acumulada por esa familia
Los precios de otros productos disponibles
Los gustos y las preferencias familiares
Las expectativas de la familia acerca del ingreso, la riqueza y los precios futuros
Sin restricciones
Recuerde que los programas de demanda y las curvas de demanda expresan la relación entre la cantidad
demandada y el precio, ceteris paribus.
Sin embargo en la vida real el comportamiento de estas variables es por mucho, más complejo.
Elecciones
De la teoría a la matemática
La interacción
humana se rige
por el interés
personal. Por
tanto toman
decisiones
racionales para
maximizar su
beneficio
Las personas
desean acumular
riqueza. Buscan el
máximo bienestar
posible,
empleando el
mínimo esfuerzo
posible.
El problema de
optimización.
Homo
œconomicus
Adam Smith
John Stuart
Mill
William Stanley
Jevons
Francis
Edgeworth
Léon
Walras
Vilfredo
Pareto
Funciones de
utilidad
Optimización
Construyeron modelos matemáticos
bajo el supuesto del Homo
oeconomicus
Thorstein
Veblen
John Maynard
Keynes
Herbert
Alexander
Simon
Información
limitada
Critica al Homo Economicus
Existe incertidumbre en el corto y largo plazo
Incertidumbre y racionalidad limitada para la toma de
decisiones económicas, (el hombre no está plenamente
informado)
Restricción
presupuestaria
Límites que imponen los
ingresos, la riqueza y los
precios de los productos a las
elecciones familiares.
Un ejemplo…
Una restricción presupuestaria separa
aquellas combinaciones de bienes y
servicios que están disponibles,
considerando un ingreso limitado, de
aquellas que no lo están. Las
combinaciones disponibles forman el
conjunto de oportunidades.
La formalización matemática es
𝑃𝑥𝑋 + 𝑃𝑦𝑌 = 𝐼
20𝑋 + 10𝑌 = 200
La base de la elección: Utilidad
Satisfacción que
brinda un producto
El hecho de que un artículo sea preferible frente a otro depende de cuánta utilidad,
o satisfacción, brinde en comparación con sus alternativas
- No se puede medir
- No se puede comparar entre individuos
Problemas
Utilidad marginal decreciente
Utilidad marginal: Es la satisfacción adicional que se obtiene por el consumo o el uso de una unidad más de
un bien o servicio.
Utilidad total: Es el monto total de satisfacción que se obtiene a partir del consumo de un bien o servicio.
Ley de la utilidad marginal decreciente: Cuanto mayor es el consumo de cualquier bien en un periodo
determinado, menor será la satisfacción (utilidad) generada por el consumo de cada unidad adicional
(marginal) del mismo bien.
Regla de maximización de la utilidad
Consiste en igualar
las razones entre la
utilidad marginal de
cada bien y su
precio, considerando
todos los bienes.
𝑈𝑀𝑥
𝑃𝑥
=
𝑈𝑀𝑦
𝑃𝑦

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Comportamiento familiar y opciones de consumo

  • 2. Elección familiar en los mercados de producción 1. ¿Qué cantidad de producto, o conjunto de productos demandará? 2. ¿Qué cantidad de trabajo ofrecerá? 3. ¿Cuánto gastará el día de hoy y cuanto ahorrará para el futuro?
  • 3. Recordemos los determinantes de la demanda familiar El precio del producto El ingreso familiar disponible La cantidad de riqueza acumulada por esa familia Los precios de otros productos disponibles Los gustos y las preferencias familiares Las expectativas de la familia acerca del ingreso, la riqueza y los precios futuros
  • 4. Sin restricciones Recuerde que los programas de demanda y las curvas de demanda expresan la relación entre la cantidad demandada y el precio, ceteris paribus. Sin embargo en la vida real el comportamiento de estas variables es por mucho, más complejo.
  • 6. De la teoría a la matemática La interacción humana se rige por el interés personal. Por tanto toman decisiones racionales para maximizar su beneficio Las personas desean acumular riqueza. Buscan el máximo bienestar posible, empleando el mínimo esfuerzo posible. El problema de optimización. Homo œconomicus Adam Smith John Stuart Mill William Stanley Jevons Francis Edgeworth Léon Walras Vilfredo Pareto Funciones de utilidad Optimización Construyeron modelos matemáticos bajo el supuesto del Homo oeconomicus Thorstein Veblen John Maynard Keynes Herbert Alexander Simon Información limitada Critica al Homo Economicus Existe incertidumbre en el corto y largo plazo Incertidumbre y racionalidad limitada para la toma de decisiones económicas, (el hombre no está plenamente informado)
  • 7. Restricción presupuestaria Límites que imponen los ingresos, la riqueza y los precios de los productos a las elecciones familiares.
  • 8. Un ejemplo… Una restricción presupuestaria separa aquellas combinaciones de bienes y servicios que están disponibles, considerando un ingreso limitado, de aquellas que no lo están. Las combinaciones disponibles forman el conjunto de oportunidades.
  • 9. La formalización matemática es 𝑃𝑥𝑋 + 𝑃𝑦𝑌 = 𝐼 20𝑋 + 10𝑌 = 200
  • 10. La base de la elección: Utilidad Satisfacción que brinda un producto El hecho de que un artículo sea preferible frente a otro depende de cuánta utilidad, o satisfacción, brinde en comparación con sus alternativas - No se puede medir - No se puede comparar entre individuos Problemas
  • 11. Utilidad marginal decreciente Utilidad marginal: Es la satisfacción adicional que se obtiene por el consumo o el uso de una unidad más de un bien o servicio. Utilidad total: Es el monto total de satisfacción que se obtiene a partir del consumo de un bien o servicio. Ley de la utilidad marginal decreciente: Cuanto mayor es el consumo de cualquier bien en un periodo determinado, menor será la satisfacción (utilidad) generada por el consumo de cada unidad adicional (marginal) del mismo bien.
  • 12. Regla de maximización de la utilidad Consiste en igualar las razones entre la utilidad marginal de cada bien y su precio, considerando todos los bienes. 𝑈𝑀𝑥 𝑃𝑥 = 𝑈𝑀𝑦 𝑃𝑦