The credit derivative that, for a fee, gives the purchaser the right to receive profits that are tied either to the price of an underlying security or to an interest rate is called a

An increase in the number of hours worked would

a. shift the production function upward. b. shift the production function downward. c. shift the production function outward. d. not shift the production function.

Suppose that an industry consists of 10 firms, and the top 4 firms have annual sales of $2.5 million, $2 million, $1.5 million, and $1 million, respectively. If the entire industry has annual sales of $10 million, the four-firm concentration ratio is

A) 85 percent. B) 50 percent. C) 10 percent. D) 70 percent.