Mary can clean 20 windows per hour or type 30 pages of paper per hour. Tom can clean 18 windows per hour or he can type 25 pages of paper per hour. Based on this
A) Mary has comparative advantages in activities.
B) Tom has comparative advantages in both activities.
C) Tom has a comparative advantage in cleaning windows.
D) Mary has a comparative advantage in cleaning windows.
C
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A citizen who acquires good information about the candidates before voting in a presidential election thereby
A) imposes spillover costs on all other registered voters. B) increases the probability others will also acquire information before voting. C) incurs a substantial cost; yet, his vote no discernible effect on the election. D) makes it much more likely a candidate will be elected who will promote that voter's interests. E) makes it much more likely a good candidate will be elected.
A monopsony will:
a. hire more workers than a competitive employer. b. pay a higher wage than a competitive employer. c. employ a quantity of labor where the marginal revenue product equals the marginal factor cost. d. all of these.
In the graph below at P*, the firm is making ________ economic profits. 
A. positive B. an indeterminate level of C. zero D. negative
An increase in an economy's productive resources
a. implies that the law of increasing costs no longer applies. b. shifts its production possibilities curve inward. c. shifts its production possibilities curve outward. d. has no effect on its production possibilities curve.