The extra cost associated with undertaking an activity is called

The data in the table above are the U.S. balance of payments. The sum of the current account plus capital and financial account plus official settlements account is equal to

A) $0. B) -$335 billion. C) $140 billion. D) -$60 billion.

Economists generally recognize that rent controls cause shortages in housing, yet rent controls tend to persist. Why does this occur?

a. Many people do not understand the effects that controls cause. b. Property owners are politically unpopular. c. Many persons tend to benefit from rent controls. d. All of the above are correct.