N ° 2008 - 24 Macroeconomic and monetary policies from the " eductive " viewpoint
نویسنده
چکیده
The "eductive" viewpoint provides a theoretically sophisticated analysis as well as an intuitively plausible shortcut to the study of expectational coordination in economic models. From the review of expectational criteria in a class of dynamical models of macroeconomic theory, the paper shows how such an "eductive" viewpoint completes and deepens rather than contradicts standard analysis. It however argues that the "eductive" approach, when correctly implemented, challenges the conditions of learning in infinite-horizon models with infinitely-lived agents. In particular, in a simple monetary model adopting such a framework, Taylor rules may be stabilizing, in the demanding sense under scrutiny, but only within a small window for the reaction coefficient. Résumé : Le point de vue dit "divinatoire" fournit à la fois une alternative théoriquement élaborée et un raccourci intuitivement plausible à l’étude de la coordination des anticipations. Il conduit à approfondir l’analyse standard, comme le montre, à partir d’une revue de familles de modèles dynamiques utilisés en macroéconomie, l’examen ∗I thank participants to the November meeting at the Central Bank of Chile for their constructive remarks. I thank Carl Walsh for useful comments on an earlier draf and X. Ragot for discussions on these issues. I am specially grateful to A. d’Autume, for pointing out an error in a previous version. Also, Section 6 significantly borrows from the joint study of "eductive" learning in RBC like models undertaken with G. Evans and B. Mc Gough. (see references in the bibliography) 1 ha ls hs -0 05 86 74 9, v er si on 1 18 A pr 2 01 1 et la comparaison des critères habituellement utilisés. Cependant, le point de vue, lorsqu’il est convenablement compris, conduit à un réexamen profond de l’apprentissage dans les modèles à horizon infini peuplés d’agents à durée de vie infinie. En particulier dans un modèle simple, suceptible d’éclairer l’analyse des politiques monétaires, les régles de Taylor ne sont stabilisantes, au sens exigeant requis ici, que lorsque les coefficients de réaction sont dans une fenêtre étroite.
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