Cet article étudie les effets des politiques de désin?ation sur la dynamique macroéconomique américaine. Les politiques de désin?ation sont identifiées à l?aide d?une technique d?épisode comme des chocs réduisant de façon permanente le niveau d?in?ation de long terme. Nous montrons que...

This paper presents the original and main contributions of T. Sargent and C. Sims to macro-economic modeling. We first briefly review the critics Sargent and Sims addressed to existing modeling. We then emphasize the originality of their two respective approaches. We finally show how their...

Real business cycle (RBC) models with permanent technology shocks usually cannot reproduce business cycle stylized facts. This implies that with a prior in favor of the presence of a unit root in the main macroeconomic variables, one must dismiss the RBC methodology. In this paper we show that...