In the short run, a model of how expectations are formed
A) must be the single model that supports the natural-rate property in the long run.
B) must be singularly identified and employed to ex p l o re the effe c t iveness of m a ny diffe rent policies if comparat ive policy studies are to be meaningful.
C) must be altered whenever macroeconomic policy changes.
D) makes little difference when it comes to reaching qualitative results already supported by empirical research.
E) none of the above.

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The Answer of In the short run, a model of how expectations are formed
A) must be the single model that supports the natural-rate property in the long run.
B) must be singularly identified and employed to ex p l o re the effe c t iveness of m a ny diffe rent policies if comparat ive policy studies are to be meaningful.
C) must be altered whenever macroeconomic policy changes.
D) makes little difference when it comes to reaching qualitative results already supported by empirical research.
E) none of the above.

In the Short Run, a Model of How Expectations Are