Traditional Keynesians would argue that fluctuations in aggregate demand are closely tied to fluctuations in investment

Bobby was researching the economic growth of a country between 2006 and 2011. Using 2006 as the base year, he calculated a twelve percent increase for real GDP and a ten percent increase for nominal GDP. His results indicate that

A) he made an error when calculating nominal GDP. B) the quantity of goods and services produced decreased over the period. C) the quantity of goods and services produced increased and prices decreased over the period. D) the quantity of goods and services produced and prices both decreased over the period. E) the quantity of goods and services produced did not change and prices decreased over the period.

The "lemons problem" exists in the market for goods because

A) sellers tend to try to take advantage of buyers. B) buyers tend to try to take advantage of sellers. C) differences in the quality of the goods being exchanged. D) of moral hazard.