Refer to the figure above. The consumer surplus before the tax is imposed is given by the area ________

When people donate money to a charity, they behave

A) rationally if the act gives them satisfaction. B) irrationally because the act does not benefit anyone. C) in an unpredictable manner because the act involves no incentive. D) in a way that only makes themselves worse off.

If leisure were an inferior good, then labor supply curves

a. would all be negatively sloped. b. would all be positively sloped. c. would all be vertical. d. could still be positively or negatively sloped.