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Time-Consistent Policy and Persistent Changes in Inflation

Laurence Ball

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Abstract

This paper presents a model of dynamically consistent monetary policy that explains changes in inflation over time. In the model -- as in the postwar United States -- adverse supply shocks trigger persistent increases in inflation, and disinflation occurs when a tough policymaker creates a recession. The paper also proposes an approach to selecting a unique, plausible equilibrium in infinite-horizon models of monetary policy.

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This paper presents a model of dynamically consistent monetary policy that explains changes in inflation over time. In the model -- as in the postwar United States -- adverse supply shocks trigger persistent increases in inflation, and disinflation occurs when a tough policymaker creates a recession. The paper also proposes an approach to selecting a unique, plausible equilibrium in infinite-horizon models of monetary policy.

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Available abstract

This paper presents a model of dynamically consistent monetary policy that explains changes in inflation over time. In the model -- as in the postwar United States -- adverse supply shocks trigger persistent increases in inflation, and disinflation occurs when a tough policymaker creates a recession. The paper also proposes an approach to selecting a unique, plausible equilibrium in infinite-horizon models of monetary policy.

Key concepts: Disinflation, Economics, Monetary policy, Inflation (cosmology), Recession, Keynesian economics, Monetary economics, Inflation targeting

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