2. General Equilibrium. consumers, each with the same Cobb-Douglas preferences except with differ- ent parameters. Consumer 1 has utility function u(x, x)= (x})"(x})'-«, while Consumer 2 has utility function u(x, x3) = (x}P(x})'-P. The endowment of good j owned by consumer i is denoted w. The price of good 1 is p, and the price of good 2 is 1. In the superscript, we denoted the consumer i = 1,2; in the subscript, we denote the good j= 1,2. Consider an exchange economy with two Write the maximisation problem faced by each consumer i = (a) 1,2, taking care to define the objective function and the budget constraint. Set up the Lagrangian and find the first order conditions. For each consumer i = 1,2, use the first-order conditions to (b) determine the demand functions for each consumer i = 1,2 and for each good j = 1,2, in terms of the price p.- (c) Find the aggregate demand for each good j = 1,2 and clear the markets for each good. Hence, show that the equilibrium price p; is given by the expression aw;+Bw? [(1-a)w} +(1-B)w}] Define Walras' here and show that this holds here.

Microeconomic Theory
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Chapter4: Utility Maximization And Choice
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Problem 4.14P
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part F G H

2. General Equilibrium.
consumers, each with the same Cobb-Douglas preferences except with differ-
ent parameters. Consumer 1 has utility function u(x, x)= (x})"(x})!-«, while
Consumer 2 has utility function u(x, x;) = (xP(x)-P. The endowment of
good j owned by consumer i is denoted w. The price of good 1 is p, and the
price of good 2 is 1. In the superscript, we denoted the consumer i = 1,2; in the
subscript, we denote the good j= 1,2.
Consider an exchange economy with two
Write the maximisation problem faced by each consumer i =
(a)
1,2, taking care to define the objective function and the budget constraint.
Set up the Lagrangian and find the first order conditions.
(b)
For each consumer i = 1,2 , use the first-order conditions to
determine the demand functions for each consumer i = 1,2 and for each
good j = 1,2, in terms of the price p.
(c)
Find the aggregate demand for each good j = 1,2 and clear the
markets for each good. Hence, show that the equilibrium price pi is given
by the expression
aw; +Bw;
[(1-a)w} +(1-B)w}]
Define Walras' here and show that this holds here.
Transcribed Image Text:2. General Equilibrium. consumers, each with the same Cobb-Douglas preferences except with differ- ent parameters. Consumer 1 has utility function u(x, x)= (x})"(x})!-«, while Consumer 2 has utility function u(x, x;) = (xP(x)-P. The endowment of good j owned by consumer i is denoted w. The price of good 1 is p, and the price of good 2 is 1. In the superscript, we denoted the consumer i = 1,2; in the subscript, we denote the good j= 1,2. Consider an exchange economy with two Write the maximisation problem faced by each consumer i = (a) 1,2, taking care to define the objective function and the budget constraint. Set up the Lagrangian and find the first order conditions. (b) For each consumer i = 1,2 , use the first-order conditions to determine the demand functions for each consumer i = 1,2 and for each good j = 1,2, in terms of the price p. (c) Find the aggregate demand for each good j = 1,2 and clear the markets for each good. Hence, show that the equilibrium price pi is given by the expression aw; +Bw; [(1-a)w} +(1-B)w}] Define Walras' here and show that this holds here.
Examine how the equilibrium price p changes with respect to
the endowment of good 1, i.e. with respect to w for i = 1,2, and with re-
spect to the endowment of good 2, i.e. with respect to w for i = 1,2. Give
(d)
intuition for these results.
(HINT: You may, but need not, take respective derivatives of the expres-
sion for equilibrium price with respect to each variable of interest to estab-
lish the comparative statics asked for here. Simple observation will suffice
here.)
Examine how the equilibrium price p changes with respect to
(e)
the taste for good 1, that is, with respect to a and B. Give intuition for these
results. (HINT: Same remark as for the previous part)
(f)
each good is 4, and that w = 1, w =3, } =3, w} = 1. Assume further that
a = B = 1/2. Plug these value into the expressions found above to find the
equilibrium price and allocations.
For the following parts, assume that the total endowment for
(3)
economy with these values.
Define what is meant by a core, and determine the core in this
(h)
Draw an Edgeworth box, taking care to reflect the initial en-
dowments, the Pareto frontier, the contract curve, the core and the equi-
librium allocation this economy. You need not find an exact solution for
the indifference curves, but only a graphical representation.
Transcribed Image Text:Examine how the equilibrium price p changes with respect to the endowment of good 1, i.e. with respect to w for i = 1,2, and with re- spect to the endowment of good 2, i.e. with respect to w for i = 1,2. Give (d) intuition for these results. (HINT: You may, but need not, take respective derivatives of the expres- sion for equilibrium price with respect to each variable of interest to estab- lish the comparative statics asked for here. Simple observation will suffice here.) Examine how the equilibrium price p changes with respect to (e) the taste for good 1, that is, with respect to a and B. Give intuition for these results. (HINT: Same remark as for the previous part) (f) each good is 4, and that w = 1, w =3, } =3, w} = 1. Assume further that a = B = 1/2. Plug these value into the expressions found above to find the equilibrium price and allocations. For the following parts, assume that the total endowment for (3) economy with these values. Define what is meant by a core, and determine the core in this (h) Draw an Edgeworth box, taking care to reflect the initial en- dowments, the Pareto frontier, the contract curve, the core and the equi- librium allocation this economy. You need not find an exact solution for the indifference curves, but only a graphical representation.
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