The free-rider problem can arise when consumption of a good is

Other things remaining the same, an increase in the price level

A) decreases the quantity of real GDP supplied. B) decreases aggregate supply. C) increases aggregate supply. D) increases the quantity of real GDP supplied. E) neither changes aggregate supply nor changes the quantity of real GDP supplied.

Which of the following is a significant barrier to reducing the damage people do to one another's environment?

A) Low negotiation costs among people B) Property rights clearly assigned to specific persons C) Scarcity of public or common property relative to private property D) All of them. E) None of them.