As the quantity of labor increases, the marginal product of labor

D) Stock ownership makes it possible for investors to own a fractional share of a firm's future profits even if they do not participate in the operation of the firm.

A) all of the above are true. B) the stock of a single corporation is purchased. C) the stock may have to be sold within a few months. D) all stocks bought are in the same industry.

A charity that used to make an appeal to people's sense of civic or moral responsibility, but no longer does, is likely to ________ the free-rider problem and lead to a ________ level of contribution to the public good.

A. reduce; smaller B. reduce; larger C. increase; smaller D. increase; larger