A protectionist policy generally enhances free trade.

If the cross-price elasticity of demand is positive, then the

a. two goods are complements b. two goods are substitutes c. two goods have no relationship to each other d. price is below the equilibrium e. price is above the equilibrium

Consider the market for medical doctors. Suppose the opportunity cost of going to medical school increases for many individuals. Suppose it generally takes about ten years to become a practicing doctor. Holding all else constant, in ten years the equilibrium quantity of doctors will

a. increase. b. decrease. c. not change. d. It is not possible to determine what will happen to the equilibrium quantity.