10) marginal cost:
a.equals both average variable cost and average total cost at their respective minimums.
b.is the difference between total cost and total variable cost.
c.rises for a time, but then begins to decline when diminishing returns set in.
d.declines continuously as output increases.
11) other things equal, which of the following would shift an economy’s production
possibilities curve to the left?
a.the discovery of a low-cost means of generating and storing solar energy
b.the entrance of more women into the labor force
c.a law requiring mandatory retirement from the labor force at age 55
d.an increase in the proportion of total output that consists of capital or investment
goods
12) suppose a firm is in a range of production where it is experiencing economies of
scale. knowing this, we can predict that:
a.the long-run average total cost curve is upsloping.
b.a 10 percent increase in all inputs will increase output by less than 10 percent.
c.a 10 percent increase in all inputs will increase output by more than 10 percent.
d.the firm is encountering problems of managerial bureaucracy because of its size.
13) Other things equal, if $100 billion of government purchases (G) is added to private
spending (C + Ig + Xn), GDP will:
A.increase by $100 billion.
B.increase by less than $100 billion.
C.increase by more than $100 billion.
D.fall by $100 billion.