Starting from an initial long-run equilibrium, under the rational expectations
hypothesis, an anticipated shift to a more expansionary policy will increase:
a. prices but not real output in the short run.
b. real output but not prices in the short run.
c. real output in the long run but not in the short run.
d. real output in both the long run and the short run.
To be valid, an economic model must:
a. include every activity which occurs in the real world.
b. include at least 85 percent of the activity which occurs in the real world.
c. be able to predict events occurring in the real world.
d. exclude any link to the real world.
e. not be based on an abstraction of the real world.
Consumers buy less of a good as its price increases because:
a. production costs have risen.
b. substitute goods are now relatively cheaper.
c. the income of consumers has effectively risen.