In the figure above, if the market price is $12, then the total consumer surplus is

The table above shows sales of the firms in the pet food industry. The four-firm concentration ratio in the industry is

A) 59 percent. B) 80 percent. C) 70 percent. D) 40 percent.

In the United States, out-of-pocket spending on health care per person

A) has remained fairly steady since 1965. B) has been rising since 1965. C) fell from 1965 through 1995, then began to rise from 1995 to the present. D) has been falling since 1965.