Which of the following is the formula for the marginal product of labor?
A. F(L) - F(L - ?L)
B. F(L)/L
C. F(L)/?L
D. [F(L) - F(L - ?L)]/?L
D. [F(L) - F(L - ?L)]/?L
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If the demand for computers increases as consumers' incomes rise, then computers are:
A. a normal good. B. a complementary good. C. an inferior good. D. a substitute good.
The economy pictured in the figure has a(n) ________ gap with a short-run equilibrium combination of inflation and output indicated by point ________. 
A. recessionary; A B. recessionary; C C. recessionary; B D. expansionary; A
Among the sources of economic inefficiency are all of the following EXCEPT
A) price regulations. B) rapid technological change. C) monopoly. D) taxes and subsidies.
Currency traders expect the dollar to appreciate. What impact will this have on equilibrium in the foreign exchange market?
A) The dollar will appreciate, and the equilibrium quantity of dollars will increase. B) The dollar will depreciate, and the equilibrium quantity of dollars exchanged will decrease. C) The dollar will appreciate, and the equilibrium quantity of dollars will decrease. D) The dollar will appreciate, and the change in the equilibrium quantity of dollars exchanged cannot be determined.