Minimum wage laws help explain the natural rate of unemployment if they create a surplus in any labor market

If Marie buys a sailboat, which increases the productivity of her leisure time, she

a. increases her productivity of nonmarket work b. increases her productivity of market work c. will spend less time in nonmarket work d. will spend less time in leisure activities e. will spend more time in market work to pay for the boat's maintenance

When indifference curves are bowed inward, the marginal rate of substitution is

a. the same at all points along an indifference curve. b. increasing as the consumer moves to the right along an indifference curve. c. decreasing as the consumer moves to the right along an indifference curve. d. constant.