Imperfection Information, Optimal Monetary Policy and Informational Consistency
This paper examines the implications of imperfect information (II) for optimal monetary policy with a consistent set of informational assumptions for the modeller and the private sector an assumption we term the informational consistency. We use an estimated simple NK model from Levine et al. (2012), where the assumption of symmetric II significantly improves the fit of the model to US data to assess the welfare costs of II under commitment, discretion and simple Taylor-type rules. Our main results are: first, common to all information sets we find significant welfare gains from commitment only with a zero-lower bound constraint on the interest rate. Second, optimized rules take the form of a price level rule, or something very close across all information cases. Third, the combination of limited information and a lack of commitment can be particularly serious for welfare. At the same time we find that II with lags introduces a ‘tying ones hands’ effect on the policymaker that may improve welfare under discretion. Finally, the impulse response functions under our most extreme imperfect information assumption (output and inflation observed with a two-quarter delay) exhibit hump-shaped behaviour and the fiscal multiplier is significantly enhanced in this case.
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- Adam, Klaus, 2003.
"Optimal Monetary Policy with Imperfect Common Knowledge,"
CFS Working Paper Series
2003/12, Center for Financial Studies (CFS).
- Adam, Klaus, 2007. "Optimal monetary policy with imperfect common knowledge," Journal of Monetary Economics, Elsevier, vol. 54(2), pages 267-301, March.
- Adam, Klaus, 2004. "Optimal Monetary Policy with Imperfect Common Knowledge," CEPR Discussion Papers 4594, C.E.P.R. Discussion Papers.
- Adam, Klaus, 2003. "Optimal monetary policy with imperfect common knowledge," Working Paper Series 0223, European Central Bank.
- Klaus Adam, 2004. "Optimal Monetary Policy with Imperfect Common Knowledge," Econometric Society 2004 North American Winter Meetings 24, Econometric Society.
- Klaus Adam, 2003. "Optimal Monetary Policy with Imperfect Common Knowledge," Computing in Economics and Finance 2003 263, Society for Computational Economics.
- Klaus Adam, 2004. "Optimal Monetary Policy with Imperfect Common Knowledge," DNB Staff Reports (discontinued) 116, Netherlands Central Bank.
- Klaus Adam & Roberto M. Billi, 2005.
"Discretionary monetary policy and the zero lower bound on nominal interest rates,"
Research Working Paper
RWP 05-08, Federal Reserve Bank of Kansas City.
- Adam, Klaus & Billi, Roberto M., 2007. "Discretionary monetary policy and the zero lower bound on nominal interest rates," Journal of Monetary Economics, Elsevier, vol. 54(3), pages 728-752, April.
- Adam, Klaus & Billi, Roberto M., 2005. "Discretionary monetary policy and the zero lower bound on nominal interest rates," CFS Working Paper Series 2005/16, Center for Financial Studies (CFS).
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