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

The Science of Monetary Policy: A New Keynesian Perspective

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

This paper investigates the impact of tax changes on economic activity. We use the narrative record, such as presidential speeches and Congressional reports, to identify the size, timing, and principal motivation for all major post war tax policy actions. This analysis allows us to separate legislated changes into those taken for reasons related to prospective economic conditions and those taken for more exogenous reasons. The behavior of output following these more exogenous changes indicates that tax increases are highly contractionary. The effects are strongly significant, highly robust, and much larger than those obtained using broader measures of tax changes. (JEL E32, E62, H20, N12) Tax changes have been a major public policy issue in recent years. The tax cuts of 2001 and 2003 were passed amid firestorms of debate about their likely effects. Some policymakers claimed that the cuts would both stimulate the economy in the short run and increase normal output in the long run. Others argued that they would raise interest rates and lower confidence and thereby reduce output in both the short run and the long run. That views of the effects of tax changes vary so radically largely reflects the fact that measuring these effects is very difficult. Tax changes occur for many reasons. Some legislated tax changes are passed for philosophical reasons or to reduce an inherited budget deficit. Others are passed because the economy is weak and predicted to fall further, or because a war is in progress and government spending is rising. And many tax changes are not legislated at all, but occur automatically because the tax base varies with the overall level of income, or because of changes in stock prices, inflation, and other nonpolicy forces. Because the factors that give rise to tax changes are often correlated with other developments in the economy, disentangling the effects of the tax changes from the effects of these underlying factors is inherently difficult. There is pervasive omitted variable bias in any regression of output on an aggregate measure of tax changes. This paper suggests one way of dealing with this omitted variable bias. There exists a vast narrative record describing the history and motivation of tax policy changes. We first use this narrative history to separate legislated tax changes from those arising from nonpolicy develop ments. We then use the information on motivation to separate the legislated tax changes into those that are likely to be contaminated by other developments affecting output, and those that can legitimately be used to measure the macroeconomic effects of tax changes. Finally, we use the legitimate observations to derive estimates of the effects of tax changes on output that are likely to be less biased than previous estimates. Section I of the paper elaborates on the conceptual framework for this study. It emphasizes that what we seek to identify from the narrative record are tax changes that are not systematically

/pdf/the-macroeconomic-effects-of-tax-changes-estimates-based-on-2own874tku.pdf

The Macroeconomic Effects of Tax Changes: Estimates Based on a New Measure of Fiscal Shocks

ing from monetary frictions and the structure of government liabilities altogether—and instead consider what is the desirable conduct of interest rate policy, and what kind of commitments about this policy are desirable to make in advance. How Severe a Constraint Is the Zero Bound? We turn now to the question of how the existence of the zero bound restricts the degree to which a central bank’s stabilization objectives, with regard to both inflation and real activity, can be achieved, even under ideal policy. The discussion in the previous section established that the zero bound does represent a genuine constraint. It is not true that equilibria that cannot be achieved through a suitable interest rate policy can somehow be achieved through other means, and the zero bound does limit the set of possible equilibrium paths for prices and output, although the quantitative importance of this constraint remains to be seen. Nonetheless, we will see that it is not at all the case that a central bank can do nothing to mitigate the severity of the destabilizing impact of the zero bound. The reason is that inflation and output do not depend solely on the current level of short-term nominal interest rates, or even solely on the history of such rates up until the present (so that the current level of interest rates would be the only thing that could possibly change in response to an unanticipated disturbance). The expected character of future interest rate policy is also a critical determinant of the degree to which the central bank achieves its stabilization objectives, and this allows important scope for policy to be improved upon, even when there is little choice about the current level of short-term interest rates. In fact, the management of expectations is the key to successful monetary policy at all times, not just in those relatively unusual circumstances when the zero bound is reached. The effectiveness of monetary policy has little to do with the direct effect of changing the level of overnight interest rates, since the current cost of maintaining cash balances overnight is of fairly trivial significance for most business decisions. What actually matters is the private sector’s anticipation of the future path of short-term rates, because this determines equilibrium long-term interest rates as well as equilibrium exchange rates and other asset prices—all of which are quite relevant for many current spending decisions, and hence for optimal Gauti B. Eggertsson and Michael Woodford 165 1440-03 BPEA/Eggertsson 07/17/03 08:12 Page 165

/pdf/zero-bound-on-interest-rates-and-optimal-monetary-policy-3cg7u8a73g.pdf

Zero Bound on Interest Rates and Optimal Monetary Policy

We argue that the government-spending multiplier can be much larger than one when the zero lower bound on the nominal interest rate binds. The larger the fraction of government spending that occurs while the nominal interest rate is zero, the larger the value of the multiplier. After providing intuition for these results, we investigate the size of the multiplier in a dynamic, stochastic, general equilibrium model. In this model the multiplier effect is substantially larger than one when the zero bound binds. Our model is consistent with the behavior of key macro aggregates during the recent financial crisis.

/pdf/when-is-the-government-spending-multiplier-large-4apdjbeakn.pdf

When Is the Government Spending Multiplier Large

The great contraction of 2008 pushed the U.S. economy into a protracted liquidity trap (i.e., a long period with zero nominal interest rates and inflationary expectations below target). In addition, the recovery was jobless (i.e., output growth recovered but unemployment lingered). This paper presents a model that captures these three facts. The key elements of the model are downward nominal wage rigidity, a Taylor-type interest-rate feedback rule, the zero bound on nominal rates, and a confidence shock. Lack-of-confidence shocks play a central role in generating jobless recoveries, for fundamental shocks, such as disturbances to the natural rate, are shown to generate recessions featuring recoveries with job growth. The paper considers a monetary policy that can lift the economy out of the slump. Specifically, it shows that raising the nominal interest rate to its intended target for an extended period of time, rather than exacerbating the recession as conventional wisdom would have it, can boost inflationary expectations and thereby foster employment.

/pdf/the-making-of-a-great-contraction-with-a-liquidity-trap-and-40lz6pv1i6.pdf

The Making Of A Great Contraction With A Liquidity Trap and A Jobless Recovery

Open economy macroeconomics

A number of studies have stressed the role of movements in US interest rates and country spreads in driving business cycles in emerging market economies. At the same time, country spreads have been found to respond to changes in both the US interest rate and domestic conditions in emerging markets. These intricate interrelationships leave open a number of fundamental questions: Do country spreads drive business cycles in emerging countries or vice versa, or both? Do US interest rates affect emerging countries directly or primarily through their effect on country spreads? This paper addresses these and other related questions using a methodology that combines empirical and theoretical elements. The main findings are: (1) US interest rate shocks explain about 20 percent of movements in aggregate activity in emerging market economies at business-cycle frequency. (2) Country spread shocks explain about 12 percent of business-cycle movements in emerging economies. (3) About 60 percent of movements in country spreads are explained by country-spread shocks. (4) In response to an increase in US interest rates, country spreads first fall and then display a large, delayed overshooting; (5) US-interest-rate shocks affect domestic variables mostly through their effects on country spreads. (6) The fact that country spreads respond to business conditions in emerging economies significantly exacerbates aggregate volatility in these countries. (7) The US-interest-rate shocks and country-spread shocks identified in this paper are plausible in the sense that they imply similar business cycles in the context of an empirical VAR model as they do in the context of a theoretical dynamic general equilibrium model of an emerging market economy.

/pdf/country-spreads-and-emerging-countries-who-drives-whom-5a9gcplddb.pdf

Country Spreads and Emerging Countries: Who Drives Whom?

Using panel structural VAR analysis and quarterly data from four industrialized countries, we document that an increase in government purchases leads to an expansion in output and private consumption, a deterioration in the trade balance, and a depreciation of the real exchange rate (i.e., a decrease in the domestic CPI relative to the exchange-rate adjusted foreign CPI). We propose an explanation for these observed effects based on the deep habit mechanism. We estimate the key parameters of the deep-habit model employing a limited information approach. The predictions of the estimated deep-habit model fit well the observed responses of output, consumption, the trade balance, and the real exchange rate to an unanticipated government spending shock. In addition, the deep-habit model predicts that in response to an anticipated increase in government spending consumption and wages fail to increase on impact, which is consistent with the empirical evidence stemming from the narrative identification approach. In this way, the deep-habit model reconciles the findings of the SVAR and narrative literatures on the effects of government spending shocks.

Explaining the Effects of Government Spending Shocks on Consumption and the Real Exchange Rate

This paper analyzes the implications of a balanced-budget fiscal policy rule for price-level determination in a cash-in-advance economy under three alternative monetary policy regimes. It shows that the price level is indeterminate under a nominal interest rate peg and determinate under a money growth rate peg. Under a feedback rule that sets the nominal interest rate as a non-negative and non-decreasing function of the inflation rate, the price level is indeterminate for both low and high values of the inflation elasticity of the feedback rule and determinate for intermediate values. We also study balanced-budget rules that allow for bounded secondary surpluses or deficits. Comparing our results to those emphasized in the fiscal theory of the price level, it becomes clear that a key consideration for price-level determination is whether fiscal policy is specified as an exogenous sequence of primary surpluses/deficits or, alternatively, as an exogenous sequence of secondary surpluses/deficits.

Price Level Determinacy and Monetary Policy under a Balanced-Budget Requirement

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