Consider the Following Short Run Aggregate Supply Equation: Y= $\hat{\mathrm{Y}}$

Multiple Choice

Consider the following short run aggregate supply equation: Y= $\hat{\mathrm{Y}}$ + b (P - P^e) , where Y is the real output, $\hat{\mathrm{Y}}$ is the full employment output, P and P^e are the actual and expected price levels, respectively^. Which of the following is correct?

A) In the Keynesian model, b is positive because of the sticky wage assumption.
B) In the Keynesian model, b is zero because of the sticky wage assumption.
C) In the classical model, b is zero because of the price misperception assumption.
D) Both A and C are correct.