If an economy has aggregate output of $20 trillion, then aggregate income is

What is the four-firm concentration ratio if the four largest firms in an industry account for 5 percent, 6 percent, 7 percent, and 8 percent of total revenue?

A) 26 percent B) 174 percent C) 1,680 D) There is enough information given to answer the question, but none of the answers above are correct. E) There is not enough information given to answer the question.

According to the median-voter theorem, the chosen policy will be the one preferred by the:

A. the average voter, rather than the largest number of voters. B. median voter. C. largest number of voters, rather than the average voter. D. greatest average of voters, rather than the majority of voters.