Externalities can be difficult to detect in open economies.

In the short run, a perfectly competitive firm will make an economic profit as long as

A) it maximizes its profit. B) P > AVC. C) P > AFC. D) P > ATC.

Unemployment insurance provided by the U.S. government is usually funded by:

a. the excise duties imposed on the import of foreign goods. b. the national tax on payrolls levied on firms. c. external borrowing by the U.S. government. d. printing new money. e. selling off government bonds.