In Figure 6.2, the price is $20 and the shaded area represents:

If the working-age population is 20 million and labor force is 13 million, the labor force participation rate is

A) 65 percent. B) 35 percent. C) 153 percent. D) 60 percent. E) impossible to calculate because data on the number of employed workers is needed.

Free riding is not a problem in the market for a private good because

A) people who do not pay for the good can be excluded from consumption. B) the good is a rival good. C) the market eliminates the problem of externalities. D) The question errs because free riding is a problem in providing private goods.