Automobiles create externalities because they are expensive and not everyone can afford the car they want.

If the price of hot dogs increases, the demand for hot dog buns will

A) increase. B) decrease. C) remain constant. D) shift to the right.

The higher are a firm's risk-corrected returns,

A) the lower are its labor costs. B) the higher are its opportunity costs. C) the more advantage it has in obtaining investor financing. D) the more difficulty it will have financing its expansion plans.