Answer to Question #222114 in Microeconomics for M Arefin

Question #222114
Suppose consumers face the utility function:
U (Xi, Yt) = XiYt; for i = 1, 2, ... ... ... ..., M

Firms face the cost function:
Cj(qj) = q2j + F

(a) Solve for equilibrium in perfect competition.
(b) Show the effect of change in income on equilibrium quantity.
1
Expert's answer
2021-08-02T11:06:14-0400

a)

U=xyM=pxx+pyymux=ymuy=xU=xy\\M=p_xx+p_yy\\mu_x=y\\mu_y=x

muxpx=muypy=ypx=xpyy=pxpyXorX=pypxy\frac {mu_x}{p_x}=\frac{mu_y}{p_y}=\frac {y}{p_x}=\frac{x}{p_y}\\y=\frac{p_x}{p_y}X or X=\frac{p_y}{p_x}y





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