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Journal Article
Commentary on Inflation targeting and optimal monetary policy
Working Paper
Endogenous business cycles and the dynamics of output, hours, and consumption
This paper studies the business-cycle fluctuations predicted by a two-sector endogenous-business-cycle model with sector-specific external increasing returns to scale. It focuses on aspects of actual fluctuations that have been identified both as defining features of the business cycle and as ones that standard real-business-cycle models cannot explain: the autocorrelation function of output growth, the impulse response function of output to demand shocks, and the forecastable movements of output, hours, and consumption. For empirically realistic calibrations of the degree of sector-specific ...
Conference Paper
Stabilization policy and the costs of dollarization
Working Paper
A model of the Twin Ds: optimal default and devaluation
This paper characterizes jointly optimal default and exchange-rate policy in a small open economy with limited enforcement of debt contracts and downward nominal wage rigidity. Under optimal policy, default occurs during contractions and is accompanied by large devaluations. The latter inflate away real wages, thereby avoiding massive unemployment. Thus, the Twin Ds phenomenon emerges endogenously as the optimal outcome. In contrast, under fixed exchange rates, optimal default takes place in the context of large involuntary unemployment. Fixed-exchange-rate economies are shown to have ...
Journal Article
Policy implications of the New Keynesian Phillips curve
This article surveys recent advancements in the theory of optimal monetary policy in models with a New Keynesian Phillips curve. It identifies four policy implications. First, near price stability is optimal. Second, simple interest rate feedback rules that respond aggressively to price inflation deliver near-optimal equilibrium allocations. Third, interest rate rules that respond to deviations of output from trend may carry significant welfare costs. Fourth, the zero bound on nominal interest rates does not appear to be a significant obstacle for the actual implementation of low and stable ...
Conference Paper
Incomplete cost pass-through under deep habits
Working Paper
Price level determinacy and monetary policy under a balanced-budget requirement
This paper analyzes the implications of a balanced budget fiscal policy rule for the determinacy of the price level in a cash-in-advance economy under three alternative monetary policy regimes. It shows that, in such stylized models with flexible prices and a period-by-period balanced budget requirement, the price level is determinate under a money growth rate peg and is indeterminate under a pure nominal interest rate peg. Under a feedback rule whereby the nominal interest rate is set as an increasing function of the inflation rate, the price level is determinate for intermediate values of ...
Working Paper
Backward-looking interest-rate rules, interest-rate smoothing, and macroeconomic instability
The existing literature on the stabilizing properties of interest-rate feedback rules has stressed the perils of linking interest rates to forecasts of future inflation. Such rules have been found to give rise to aggregate fluctuations due to self-fulfilling expectations. In response to this concern, a growing literature has focused on the stabilizing properties of interest-rate rules whereby the central bank responds to a measure of past inflation. The consensus view that has emerged is that backward-looking rules contribute to protecting the economy from embarking on expectations-driven ...