If the hot dog vendors at Yankee Stadium are earning a producer surplus on each hot dog they sell, then baseball fans cannot be gaining any consumer surplus on the hot dogs they buy

Propecia was developed to treat mild to moderate male pattern hair loss in men. Marco has hair loss and he is willing to pay any amount of money to be able to buy this drug each month. Marco's price elasticity of demand is ________

A) perfectly inelastic B) perfectly elastic C) elastic D) inelastic

When two goods are substitutes, a shock that raises the price of one good causes the price of the other good to

A) remain unchanged. B) decrease. C) increase. D) change in an unpredictable manner.