This paper reviews the recent literature on monetary policy rules. To organize the discussion, we exposit the monetary policy design problem within a simple baseline theoretical framework. We then consider the implications of adding various real word complications. We concentrate on developing results that are robust across a reasonable variety of competing macroeconomic frameworks. Among other things, we show that the optimal policy implicitly incorporates inflation targeting. We also characterize the gains from making credible commitments to fight inflation and consider the implications of frictions such as imperfect information and model uncertainty. Finally, we assess how proposed simple rules, such as the Taylor rule, square with the principles for optimal policy that we describe. We use this same metric to evaluate the recent course of U.S. monetary policy.

/pdf/the-science-of-monetary-policy-a-new-keynesian-perspective-2513aj8m00.pdf

The Science of Monetary Policy: A New Keynesian Perspective

We present a model embodying moderate amounts of nominal rigidities that accounts for the observed inertia in inflation and persistence in output. The key features of our model are those that prevent a sharp rise in marginal costs after an expansionary shock to monetary policy. Of these features, the most important are staggered wage contracts that have an average duration of three quarters and variable capital utilization.

/pdf/nominal-rigidities-and-the-dynamic-effects-of-a-shock-to-24aok45g1c.pdf

Nominal Rigidities and the Dynamic Effects of a Shock to Monetary Policy

The paper reviews the recent literature on monetary policy rules. We exposit the monetary policy design problem within a simple baseline theoretical framework. We then consider the implications of adding various real world complications. Among other things, we show that the optimal policy implicitly incorporates inflation targeting. We also characterize the gains from making a credible commitment to fight inflation. In contrast to conventional wisdom, we show that gains from commitment may emerge even if the central bank is not trying to inadvisedly push output above its natural level. We also consider the implications of frictions such as imperfect information.

/pdf/the-science-of-monetary-policy-a-new-keynesian-perspective-1hk1n82x2a.pdf

Using a Bayesian likelihood approach, we estimate a dynamic stochastic general equilibrium model for the US economy using seven macro-economic time series. The model incorporates many types of real and nominal frictions and seven types of structural shocks. We show that this model is able to compete with Bayesian Vector Autoregression models in out-of-sample prediction. We investigate the relative empirical importance of the various frictions. Finally, using the estimated model we address a number of key issues in business cycle analysis: What are the sources of business cycle fluctuations? Can the model explain the cross-correlation between output and inflation? What are the effects of productivity on hours worked? What are the sources of the "Great Moderation"?

/pdf/shocks-and-frictions-in-us-business-cycles-a-bayesian-dsge-d1f6ynd58q.pdf

Shocks and Frictions in US Business Cycles: A Bayesian DSGE Approach

We estimate a dynamic stochastic general equilibrium (DSGE) model for the US economy. The model incorporates many types of real and nominal frictions: sticky nominal price and wage setting, habit formation in consumption, investment adjustment costs, variable capital utilisation and fixed costs in production. It also contains many types of shocks including productivity, labour supply, investment, preference, cost-push and monetary policy shocks. Using Bayesian estimation techniques, the relative importance of the various frictions and shocks in explaining the US business cycle are empirically investigated. We also show that this model is able to outperform standard VAR and BVAR models in out-of-sample prediction.

/pdf/shocks-and-frictions-in-us-business-cycles-a-bayesian-dsge-2gcs6kvruw.pdf

Shocks and frictions in US business cycles: A Bayesian DSGE approach

/pdf/a-small-structural-quarterly-model-for-monetary-policy-55x67s729j.pdf

A small, structural, quarterly model for monetary policy evaluation

https://dlib.bc.edu/islandora/object/bc-ir:103083/datastream/PDF/view

Endogenous Money or Sticky Prices

This paper takes an alternative approach to the topic of money and growth by developing a model in which the effects of sustained capital accumulation on an evolving system of payments, in addition to the conventional effects of sustained inflation on growth, are examined. While the effects of inflation on growth are small, the effects of growth on the monetary system are substantial. The results are consistent with ideas about money and growth contained in work that predates that of James Tobin and Miguel Sidrauski, as well as with evidence that money and asset demands vary systematically within economies as they develop. Copyright 1994 by American Economic Association.

Money and growth: An alternative approach

This paper presents a general equilibrium monetary model in which inflation distorts a variety of marginal decisions. Although individually none of the distortions is very large, they combine to yield substantial welfare cost estimates. A sustained 4% inflation like that experienced in the U.S. since 1983 costs the economy the equivalent of 0.41% of output per year when currency is identified as the relevant definition of money and over 1% of output per year when M1 is defined as money. The results illustrate how the traditional, partial equilibrium approach can seriously underestimate the true cost of inflation.

Peter N. Ireland

Papers

A small, structural, quarterly model for monetary policy evaluation

Endogenous Money or Sticky Prices

Money and growth: An alternative approach

The Welfare Cost of Inflation in General Equilibrium

Does the time-consistency problem explain the behavior of inflation in the United States? ☆