Suppose an industry is composed of 10 firms. Each firm's share of total sales in the industry is 10 percent. If two of the firms merge, then the four-firm concentration ratio in the industry is

Which of the following is held constant along an indifference curve?

A) the prices of the goods in question B) the total utility derived from consuming any bundle of goods on the indifference curve C) the marginal rate of substitution between the two goods in question D) the marginal utility derived from consuming any bundle of goods on the indifference curve

Economic growth in the United States has increased consistently since the 1950s.

Answer the following statement true (T) or false (F)