If an increase in the price of Good X causes a decrease in the demand for Good Y, we can conclude that:
a. Goods X and Y are complements.
b. Goods X and Y are substitutes

In the _______ range of the aggregate supply curve, expansionary fiscal policy that causes aggregate ______ to increase will lead to a higher price level and a higher equilibrium level of real GDP

a. Keynesian, supply b. Classical, demand c. Intermediate, demand d. Intermediate, supply

Which of the following has contributed to decreased concentration in U.S. industry since the 1970s?

a. rising interest rates and disinflation b. segmentation and economies of scale c. devaluation and economies of scale d. technological change and market globalization e. marginal cost pricing and product differentiation