The Keynesian perspective focuses on the demand-side of the economy;

A view of a spectacular sunset on a beach is ________

A) a rival and excludable good B) an excludable good C) a non-rival good D) a rival but non-excludable good

Which of the following is true about a monopolistically competitive firm?

a. It can earn an economic profit in the short run, but not the long run. b. It can earn an economic profit in the short run and the long run c. It can earn an economic profit in the long run, but not the short run d. It cannot earn an economic profit in either the short or long run