8) Suppose there is a 6 percent increase in the price of good X and a resulting 6 percent
decrease in the quantity of X demanded. for X is
a.0
b.1
c.6
d.36
9) While in college, John and Bethany each buy five packages of mac-n-cheese per
week. After they graduate and have full-time jobs, John buys six packages per week,
but Bethany buys only two packages per week. When looking at income elasticity of
demand for macncheese, John’s
a.is negative, and Bethany’s is positive.
b.is positive, and Bethany’s is negative.
c.is zero, and Bethany’s approaches infinity.
d.approaches infinity, and Bethany’s is zero.
10) For maximum profit, a firm hires labor up to the point at which the wage equals
(i)the value of the marginal product of labor.
(ii)the marginal cost of an additional unit of output.
(iii)output price multiplied by the marginal product of labor.
a.(i) and (ii) only
b.(i) and (iii) only
c.(ii) and (iii) only
d.(i), (ii), and (iii)
11) Table 17-29
Suppose that two firms, Wild Willy’s Wonderdrink (Firm W) and Hyper Hank’s
Hydration (Firm H), comprise the market for energy drinks. Each firm determines that
it could lower its costs and increase its profits if both firms reduced their advertising
budgets. But for the plan to work, each firm must agree to refrain from advertising.
Each firm believes that advertising works by increasing the demand for the firm’s
energy drinks, but each firm also believes that if neither firm advertises, the cost
savings will outweigh the lost sales. The table below lists each firm’s individual profits:
Firm W
Breaks agreement Maintains agreement
and advertises and does not advertise