The purchasing power parity theory
a. is more a predictor of a long-run tendency than of the day-to-day relationship
between changes in the price level and the exchange rate
b. predicts that exchange rates between two currencies will adjust in the long run to
reflect the price level difference between two countries
c. is more a predictor of a short-run phenomenon than of a long-run relationship
between the price level and the exchange rate between two countries
d. is helpful in explaining long-run trends, even though trade barriers and central bank
intervention may hinder the usefulness of the theory
e. tells us that a country’s currency generally will appreciate if its inflation rate is lower
than that of the rest of the world
If supply is perfectly elastic, the supply curve is
a. vertical
b. horizontal
c. any straight-line supply curve
d. any supply curve intersecting a perfectly elastic demand curve
e. any supply curve intersecting a demand curve which is unit elastic