Reacting to the Lucas Critique: The Keynesians' Pragmatic Replies

Aurélien Goutsmedt 1, 2, * Erich Pinzón-Fuchs 3 Matthieu Renault 1 Francesco Sergi 4
* Corresponding author
2 Chaire Energie & Prospérité
ENS Paris - École normale supérieure - Paris, X - École polytechnique, ENSAE ParisTech - École Nationale de la Statistique et de l'Administration Économique, Institut Louis Bachelier
Abstract : We illustrate how the Lucas Critique was called into question by Keynesian macroeconomists during the 1970s and 1980s. Our claim is that Keynesians' reactions were carried out from a pragmatic approach, which addressed the empirical and practical relevance of the Critique. Keynesians rejected the Critique as a general principle with no relevance for concrete macroeconometric practice; their rejection relied on econometric investigations and contextual analysis of the U.S. 1970s stagflation and its aftermath. Keynesians argued that the parameters of their models remained stable across this period, and that simpler ways to account for stagflation (such as the introduction of supply shocks into their models) provided better alternatives to improve policy evaluation.
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Aurélien Goutsmedt, Erich Pinzón-Fuchs, Matthieu Renault, Francesco Sergi. Reacting to the Lucas Critique: The Keynesians' Pragmatic Replies. 2017. ⟨halshs-01625169⟩

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