Priors about observables in vector autoregressions

Fecha:	2013
Descripción:	36 p.
Resumen:	Standard practice in Bayesian VARs is to formulate priors on the autoregressive parameters, but economists and policy makers actually have priors about the behavior of observable variables. We show how this kind of prior can be used in a VAR under strict probability theory principles. We state the inverse problem to be solved and we propose a numerical algorithm that works well in practical situations with a very large number of parameters. We prove various convergence theorems for the algorithm. As an application, we first show that the results in Christiano et al. (1999) are very sensitive to the introduction of various priors that are widely used. These priors turn out to be associated with undesirable priors on observables. But an empirical prior on observables helps clarify the relevance of these estimates: we find much higher persistence of output responses to monetary policy shocks than the one reported in Christiano et al. (1999) and a significantly larger total effect.
Derechos:	Tots els drets reservats.
Lengua:	Anglès
Colección:	Departament d'Economia i d'Història Econòmica. Unitat de Fonaments de l'Anàlisi Econòmica / Institut d'Anàlisi Econòmica (CSIC). Working papers
Colección:	Working papers ; 929.13
Documento:	Working paper
Materia:	Política monetària ; Models economètrics ; Decisió estadística bayesiana, Teoria de la

36 p, 436.3 KB

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