What was the official poverty level for a person living alone in 2012?

To correct for a negative externality, a government might impose a uniform tax related only to the physical quantity of pollution if

A) the administrative costs are high. B) the cost of ascertaining the actual economic costs are relatively small. C) the economic damages are zero. D) the economic damages associated with the pollution are different across different locations.

The federal funds rate is the interest rate that

a. banks charge one another for loans. b. banks charge the Fed for loans. c. the Fed charges banks for loans. d. the Fed charges Congress for loans.