tex Monetary Policy with Model Uncertainty : Distribution Forecast Targeting ∗

نویسندگان

  • Noah Williams
  • Boris Hoffman
  • Eric Leeper
  • Fabio Milani
چکیده

We examine optimal and other monetary policies in a linear-quadratic setup with a relatively general form of model uncertainty, so-called Markov jump-linear-quadratic systems extended to include forward-looking variables and unobservable “modes.” The form of model uncertainty our framework encompasses includes: simple i.i.d. model deviations; serially correlated model deviations; estimable regime-switching models; more complex structural uncertainty about very different models, for instance, backwardand forward-looking models; time-varying centralbank judgment about the state of model uncertainty; and so forth. We provide an algorithm for finding the optimal policy as well as solutions for arbitrary policy functions. This allows us to compute and plot consistent distribution forecasts—fan charts—of target variables and instruments. Our methods hence extend certainty equivalence and “mean forecast targeting” to more general certainty non-equivalence and “distribution forecast targeting.” JEL Classification: E42, E52, E58

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تاریخ انتشار 2007