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d. All of the above. 31. In "real business cycle theory", an expansion is caused by a. an increase in productivity. b. an increase in employment. c. an increase in ination. d. All of the above. 32. US Expansions and contractions a. occur periodically in US history. b. can be eliminated with good policy. c. rarely if ever occur. d. All of the above. 33. Real GDP moves procyclically with a. unemployment. b. investment. c. consumption divided by GDP. d. government expenditure. 34. Consumption is positively correlated with real GDP and a. rises and falls similarly to GDP. b. is procyclic. c. is positively correlated with Investment. d. All of the above. 35. The following shares of GDP are procyclic a. GjY. b. IjY. c. CjY. d. All of the above. 36. The US structural transformation of output involves shifting from a. manufacturing towards high human capital intensive sectors. b. agriculture towards high tech services c. low human capital {HG} intensive sectors to high HG intensive