How Has the Monetary Transmission Mechanism Evolved Over Time?
We discuss the evolution in macroeconomic thought on the monetary policy transmission mechanism and present related empirical evidence. The core channels of policy transmission — the neoclassical links between short-term policy interest rates, other asset prices such as long-term interest rates, equity prices, and the exchange rate, and the consequent effects on household and business demand — have remained steady from early policy-oriented models (like the Penn-MIT-SSRC MPS model) to modern dynamic, stochastic general equilibrium (DSGE) models.