Technically speaking, when the firm's output level is zero, its total revenue equals

The entrance of the U.S. into the Korean War in June of 1950 led to:

a. deflation. b. an increase in the unemployment rate. c. a long and deep recession. d. a surge in consumer demand. e. All of the above.

Because of specialization and comparative advantage, most people

a. consume only what they produce themselves b. consume the products produced by their family and friends c. consume the products of many other specialists d. do not use money as a medium of exchange e. share whatever they produce