If income increases from $110,000 to $120,000 and consumption from $108,000 to
$114,000, the marginal propensity to consume is:
a. 0.40.
b. 0.60.
c. 0.94.
d. 1.60.
Which of the following is a free rider?
a. Butch breeds the feared pit bulls, and his neighbors now erect fences around their
property.
b. Fred watches many public television programs, but he has never sent in a
contribution.
c. Barry steals candy from the store where he works.
d. Betty regularly uses the local public library.
e. Joe drives 20,000 miles a year on public streets, but he pays no more in taxes than
Sam, who only drives 1,000 miles.