How Credible Is the Federal Reserve? A Structural Estimation of Policy Re-optimizations

The paper proposes a new measure of the degree of credibility of the Federal Reserve. We estimate a medium-scale macroeconomic model, where the central bank has access to a commitment technology, but where a regime-switching process governs occasional re-optimizations of announced plans. The framework nests the commonly used discretion and commitment cases, while allowing for a continuum of intermediate cases. Our estimates reject both full-commitment and discretion. We instead identify occasional re-optimization episodes both before and during the Great Moderation period. Finally, through counterfactual analyses we assess the role of credibility over the past four decades.