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4. (15 points) Consider an exchange economy with two representative consumers (1 and 2) and two goods (A and B). The preference of both consumers

4. (15 points) Consider an exchange economy with two representative consumers (1 and 2) and two goods (A and B). The preference of both consumers are given asu1(x1A,x1B) =x1/2x1/2,

1A1Bu2(x2A,x2B) =x2Ax2B. The initial endowments for consumer 1 isw1= (w1A,w1B) = (10,3)

1/2 1/2

and the initial endowments for consumer 2 isw2= (w2A,w2B) = (6,7).

Suppose there is a market and the two consumers are both price-takers. They meet in the market and trade with each other. Suppose the price for good A is normalized to be always 1,pA1.

(a) (5 points) Suppose the initial endowment is highlighted as point E in the following Edgeworth box. Highlight (1) the Pareto efficient set , and (2) the possible trading outcomes based on voluntary transaction no matter what is the market mechanism

(economic core).

(b) (3 points) Given PA = 1 and PB (to be solved). Write down the budget constraint for each consumer.

(c) (7 points) Solve for the general equilibrium price PB? What is the consumption for each consumer?

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