Home About Latest Browse RSS Advanced Search

Federal Reserve Bank of San Francisco
Working Paper Series
Model uncertainty, robust policies, and the value of commitment
Kenneth Kasa
Abstract

Using results from the literature on H-control, this paper incorporates model uncertainty into Whiteman's (1986) frequency domain approach to stabilization policy. The derived policies guarantee a minimum performance level even in the worst of (a bounded set of) circumstances. ; For a given level of model uncertainty, robust H- policies are shown to be more 'activist' than Whiteman's H- policies in the sense that their impulse responses are larger. Robust policies also tend to be more autocorrelated. Consequently, the premium associated with being able to commit is greater under model uncertainty. Without commitment, the policymaker isn't able to (credibly) smooth his response to the degree that he would like. ; From a technical standpoint, a contribution of this paper is its analysis of robust control in a model featuring a forward-looking state transition equation, which arises from the fact that the private sector bases its decisions on expectations of future government policy. Existing applications of H- control in economics follow the engineering literature, and only consider backward-looking state transition equations. It is the forward-looking nature of the state transition equation that makes a frequency domain approach attractive.


Download Full text
Cite this item
Kenneth Kasa, Model uncertainty, robust policies, and the value of commitment, Federal Reserve Bank of San Francisco, Working Paper Series 99-14, 1999.
More from this series
JEL Classification:
Subject headings:
Keywords: Econometric models ; Programming (Mathematics)
For corrections, contact Noah Pollaczek ()
Fed-in-Print is the central catalog of publications within the Federal Reserve System. It is managed and hosted by the Economic Research Division, Federal Reserve Bank of St. Louis.

Privacy Legal