John Taylor and David Romer champion an approach to teaching undergraduate macroeconomics that dispenses with the LM half of the IS-LM model and replaces it with a rule for setting the interest rate as a function of inflation and the output gap - i.e., a Taylor rule. But the IS curve is...

This paper presents evidence that throughout the 1973-85 period the Federal Reserve systematically used certain types of discount rate announcements to signal changes in its policy instrument, the Federal funds rate. Market participants understood the signals contained in discount rate...