The growth rate of output per worker is called

According to the principle of comparative advantage, total output and consumption levels will be highest when goods are produced in nations according to which of the following conditions?

a. Opportunity costs are lowest. b. Absolute advantages are highest. c. Opportunity costs are equal. d. Absolute advantages are lowest.

Recently a teachers' union argued that the standard of living of teachers working for the school district was falling. The negotiating team for the school board replied that this was not true because the teachers had received significant increases in nominal income through collective bargaining. Could the union statement be correct?

A.  No, because real income may rise if price increases are proportionately greater than the increases in nominal income B.  Yes, because real income may fall if price increases are proportionately smaller than the increases in nominal income C.  Yes, because real income may fall if price increases are proportionately greater than the increases in nominal income D.  No, because real income may rise if price increases are proportionately greater than declines in nominal income