In one hour, George can fix 4 flat tires or type 200 words. His opportunity cost of fixing a flat tire is

Keynes believed which of the following?

A. The government has a role to play in fighting unemployment, but not in fighting inflation. B. The government has a role to play in fighting inflation and unemployment. C. The government has a role to play in fighting inflation, but not in fighting unemployment. D. The government does not have a role to play in fighting inflation or unemployment.

One of the assumptions underlying the production possibilities curve is that

A) at least one of the factors of production is a free good. B) the quantity of the resources available for the production of economic goods is fixed over a given time period. C) there is at least one factor of production that is employed inefficiently. D) some of the factors of production are not being used.