. Consider a market that consists of 360 consumers, i = 1,..., 360, each with the following quasi-linear utility function Ui = M¡ + log xị over the numeraire good m (whose price is normalized to one) and x; units of good l; and 10 perfectly competitive firms, j = 1, ..., 10, that produce good l. Each firm j produces q; units of good l using c; (q;) = q² /2 units of the numeraire good. Consumers are price takers, and i's endowment of the numeraire good is wi, i = 1, ..., 360. (a) Derive the individual demand function, x; (p), and aggregate demand function, x (p), of good l. (b) Derive the individual firm supply function, q; (p), and aggregate supply function, q (p), of good l.

ENGR.ECONOMIC ANALYSIS
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Chapter1: Making Economics Decisions
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4. Consider a market that consists of 360 consumers, i
1,..., 360, each with the following
quasi-linear utility function
Ui
= m; + log xi
over the numeraire good m (whose price is normalized to one) and x; units of good l; and 10
perfectly competitive firms, j = 1, ..., 10, that produce good l. Each firm j produces q; units
of good l using c; (q;) = q² /2 units of the numeraire good. Consumers are price takers, and
i's endowment of the numeraire good is Wi, i = 1, ..., 360.
(a) Derive the individual demand function, x; (p), and aggregate demand function, x (p), of
good l.
(b) Derive the individual firm supply function, q; (p), and aggregate supply function, q (p),
of good l.
(c) Find the equilibrium price p* and quantity q* of good l. What is each firm's profit?
(d) Find each consumer i's equilibrium consumption of the numeraire m as a function of
Wi. Find the condition on w; that yields a strictly positive solution for m.
(e) Write down the equilibrium utilities u as a function of the initial endowments.
1
Transcribed Image Text:4. Consider a market that consists of 360 consumers, i 1,..., 360, each with the following quasi-linear utility function Ui = m; + log xi over the numeraire good m (whose price is normalized to one) and x; units of good l; and 10 perfectly competitive firms, j = 1, ..., 10, that produce good l. Each firm j produces q; units of good l using c; (q;) = q² /2 units of the numeraire good. Consumers are price takers, and i's endowment of the numeraire good is Wi, i = 1, ..., 360. (a) Derive the individual demand function, x; (p), and aggregate demand function, x (p), of good l. (b) Derive the individual firm supply function, q; (p), and aggregate supply function, q (p), of good l. (c) Find the equilibrium price p* and quantity q* of good l. What is each firm's profit? (d) Find each consumer i's equilibrium consumption of the numeraire m as a function of Wi. Find the condition on w; that yields a strictly positive solution for m. (e) Write down the equilibrium utilities u as a function of the initial endowments. 1
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