savage asked:
9. If firms and workers could predict the future price level exactly, the short-run aggregate supply curve would be:
A. Downward sloping.
B. Upward sloping.
C. Horizontal.
D. The same as the long-run aggregate supply curve.







SRAS curve usually sloped up due to:
1.The Sticky-Wage Theory
2.The Sticky-Price Theory
3.The Misperceptions Theory
Formally, if firms and workers would be able to predict future prices, imperfections will disappear, so SRAS=LRAS=vertical, and the answer will be (D).
There is a small caveat, though: Menu costs might still cause SRAS curve to be upward-sloping. Not sure what the Prof. really want here..