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Spring 2010Ali Toossi
Due: Tuesday, March 16 in the review session
Answer to question 2.
Unlike salt, education at a large private university has a large income effect.
Answer to question6.
Vertical summation would mean that each good could be jointly consumed. Horizontal
summation means each person consumes their commodity and excludes others from it.
Answer to question14.
The demand for tennis balls is elastic. When its price goes up, the total expenditure on the balls
goes down. Thus, the share of income available for tickets increases. Since their price is constant,
he consumes more tickets.
Answer to problem 4
First solve the demand curve for Q and multiply the result by 10. Then solve back in terms of P to
get P = 101 – Q for the market demand. At price $1/cup the individual consumes 10 cups and the
market consumes 100 cups.
Price
101
10.1
101
Cups
Answer to problem 5
a) P=10, Q=100;
So
elasticity = (P/Q)(1/slope) = (10/100)[1/(0.5)] = 0.2
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 Spring '09
 ARVANRAD
 Microeconomics

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