We estimate monetary policy activism, defined as responsiveness of the policy interest rate to inflation, among five inflation-targeting countries (the UK, Canada, Sweden, Australia and New Zealand) plus the G3 (the US, Japan and Germany) by applying a time- varying parameter with a stochastic-volatility model. We find that activism of inflation-targeting countries tends to have increased before (not after) the adoption of the inflation-targeting policy framework and that these countries have experienced a decline in activism in recent years, albeit to different degrees. We further explore this result in terms of the constraint of an inflation target range by developing a formal theoretical model in a New Keynesian framework.
Inflation-targeting Policy, Monetary Policy Activism, New Keynesian Model, Markov chain Monte Carlo, Time-varying Parameter with Stochastic Volatility Model
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