We discuss the evolution in macroeconomic thought on the monetary policy transmission mechanism and present related empirical evidence. The core channels of policy transmissionthe neoclassical links between short-term policy interest rates, other asset prices such as longterm 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. In contrast, non-neoclassical channels, such as credit-based channels, have remained outside the core models. In conjunction with this evolution in theory and modeling, there have been notable changes in policy behavior (with policy more focused on price stability) and in the reduced form correlations of policy interest rates with activity in the United States. Regulatory effects on credit provision have also changed significantly. As a result, we review the empirical evidence on the changes in the effect of monetary policy actions on real activity and inflation and present new evidence, using both a relatively unrestricted factor-augmented vector autoregression (FAVAR) and a DSGE model. Both approaches yield similar results: Monetary policy innovations have a more muted effect on real activity and inflation in recent decades as compared to the effects before 1980. Our analysis suggests that these shifts are accounted for by changes in policy behavior and the effect of these changes on expectations, leaving little role for changes in underlying private-sector behavior (outside shifts related to monetary policy changes). 4 The classic reference is Jorgenson (1963).
We thank Dalibor Stevanovic and Dane Vrabac for excellent research assistance. Our analysis benefited substantially from the comments of Ray Fair, Ben Friedman, and participants in the Key Developments in Monetary Economics conference held at the Federal Reserve Board in October 2009. Boivin acknowledges financial support from the National Science Foundation (SES-0518770) and the Social Sciences and Humanities Research Council of Canada. The views expressed are those of the authors and do not necessarily reflect the views of any institutions with which they are affiliated, nor of the National Bureau of Economic Research. NBER working papers are circulated for discussion and comment purposes. They have not been peerreviewed or been subject to the review by the NBER Board of Directors that accompanies official NBER publications.
Nominal interest rates may remain substantially below the averages of the last half century, because central banks' inflation objectives lie below the average level of inflation, and estimates of the real interest rate that are likely to prevail over the long run fall notably short of the average real interest rate experienced during this period. Persistently low nominal interest rates may lead to more frequent and costly episodes at the effective lower bound (ELB) on nominal interest rates. We revisit the frequency and potential costs of such episodes in a world of low interest rates, using both a dynamic stochastic general equilibrium (DSGE) model and the Federal Reserve's largescale econometric model, the FRB/US model. Four main conclusions emerge. First, monetary policy strategies based on traditional, simple policy rules lead to poor economic performance when the equilibrium interest rate is low, with economic activity and inflation more volatile and systematically falling short of desirable levels. Moreover, the frequency and length of ELB episodes under such policy approaches are estimated to be significantly higher than in previous studies. Second, a risk adjustment to a simple rule-whereby monetary policymakers are more accommodative, on average, than prescribed by the rule-ensures that inflation averages its 2 percent objective, and requires that policymakers systematically seek inflation near 3 percent when the ELB is not binding. Third, commitment strategies, whereby monetary accommodation is not removed until either inflation or economic activity overshoots its longrun objective, are very effective in both the DSGE and FRB/US models. And
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.