27. Private investment goods as measured in GDP are purchased by: a. business firms alone. b. households alone. c. business firms and households. d. business firms, households, and governments. - 28. All of these actions increase government purchases of goods and services EXCEPT the: a. federal government sending a Social Security check to a retired firefighter. b. federal government sending a paycheck to the president of the United States. c. federal government buying weapons. d. city of Boston buying a library book. 29. If increased immigration raises the labor force, the neoclassical theory of distribution predicts that: a. the real wage will rise and the real rental price of capital will fall. b. both the real wage and the real rental price of capital will fall. c. both the real wage and the real rental price of capital will rise. d. the real wage will fall and the real rental price of capital will rise