When we are forced to make choices we are facing the concept of:

An increase in the average tax rate, with the marginal tax rate held constant, will

A) increase the amount of labor supplied at any real wage. B) not affect the amount of labor supplied at any real wage. C) decrease the amount of labor supplied at any real wage. D) increase the amount of labor supplied at any real wage if the average tax rate is above the marginal tax rate, but decrease the amount of labor supplied at any real wage if the average tax rate is below the marginal tax rate.

Gross domestic product is a measure of both

a. the market value of a nation's capital assets (physical capital) and the costs that were incurred producing those assets. b. the expenditures on and sales revenues derived from all goods and services exchanged during a period. c. the market value of the output produced during a period and the cost of producing that output. d. the asset holdings of people and the happiness that they derived from the ownership of those assets.