If an economy can raise its annual real GDP growth rate from 3.8 percent to 4.5 percent, its real GDP doubling time is reduced by 15 years. Suppose that the government passes a law requiring households to increase savings 10% above previous levels. According to Solow's If an economy can raise its annual real GDP growth rate from 3.8 percent to 4.5 percent, its real GDP doubling time is reduced by 15 years. Suppose that the government passes a law requiring households to increase savings 10% above previous levels. According to Solow's