In a barter economy the number of prices in an economy with N goods is

In the United States, the average length of expansions from 1950 to 2009 was more than twice as long than they were from 1900 to 1950

Indicate whether the statement is true or false

Prohibiting price increases in situations of true scarcity

a. prevents the market mechanism from reallocating resources more efficiently. b. discourages production. c. may lead to extreme shortages of vitally needed products. d. All of the above are correct.