The population growth rate of the DVCs (developing countries) as a group in recent decades has been:

It would always be a mistake to view

a. many species of animals as common resources. b. a road as a public good. c. national defense as a common resource. d. a fireworks display as a public good.

A firm is using a single variable input, labor, with a given amount of a fixed input, capital. If the level of capital is decreased,

A. the average product curve of labor curve shifts downward. B. the total product curve of labor curve shifts downward. C. the marginal product curve of labor shifts downward. D. all of the above E. none of the above