Question 52 (1 point) In the short run, open-market purchases increase investment and real GDP, and decrease interest rates. increase real GDP and interest rates, and decrease investment. increase investment and interest rates, and decrease real GDP. decrease investment, interest rates, and real GDP. Question 53 (1 point) Which causes the long-run aggregate supply curve to shift left? Either an increase in the price of imported natural resources or a reduction in trade restrictions Neither an increase in the price of imported natural resources or a reduction in trade restrictions An increase in the price of imported natural resources and an increase in trade restrictions An increase in trade restrictions and a decrease in the price of imported natural resources Question 54 (1 point) In Kyrgyzstan, if the marginal propensity to consume is 0.6 then the multiplier is O 4, so a $100 increase in government spending increases aggregate demand by $400. 1.5, so a $100 increase in government spending increases output by $150. 2.5, so a $100 increase in government spending increases aggregate demand by $250. 1.67, so a $100 increase in government spending increases output by $166.67