Product differentiation in a monopolistically competitive market always entails more costs than benefits.

A rational individual would be indifferent between ________ today and ________ four years from today if the interest is 20 percent

A) $100, $100 B) $48, $100 C) $30, $100 D) $100, $48

Lisa's hourly pay increases from $8 to $10 as her performance improves. We can conclude that:

a. her marginal cost of leisure declines. b. her opportunity cost of leisure increases. c. her opportunity cost of work increases. d. her marginal cost of work declines.