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Some Evolutionary Foundations for Price Level Rigidity

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Author Info
Gilles Saint-Paul ()

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Abstract

This paper shows that price rigidity evolves in an economy populated by imperfectly rational agents who experiment with alternative rules of thumb. In the model, firms must set their prices in face of aggregate demand shocks. Their payoff depends on the level of aggregate demand, as well as on their own price and their "neighbor"'s price. The latter assumption captures local interactions. Despite the fact that the rational expectations equilibrium (REE) is characterized by a simple pricing rule that firms can easily adopt, the economy does not converge to the REE for highly autocorrelated aggregate demand shocks and a high level of local interaction. Instead, the aggregate price level exhibits rigidity, in that it does not fully react to contemporaneous aggregate demand shocks, and inertia, in that controlling to it positively depends on its past value. We show that local interactions and serial correlation of aggregate demand shocks play a key role in generating those results.

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Paper provided by CESifo GmbH in its series CESifo Working Paper Series with number CESifo Working Paper No. 720.

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Date of creation: 2002
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Handle: RePEc:ces:ceswps:_720

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Related research
Keywords: evolution bounded rationality adaptive learning experimentation externalities spillovers local interaction money aggregate demand price rigidity rational expectations monetary policy macroeconomic fluctuations

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Find related papers by JEL classification:
D83 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Search, Learning, and Information
D84 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Expectations; Speculations
E30 - Macroeconomics and Monetary Economics - - Prices, Business Fluctuations, and Cycles - - - General (includes Measurement and Data)

Cited by:
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  1. Albert Marcet & Juan Pablo Nicolini, 2005. "Money and Prices in Models of Bounded Rationality in High Inflation Economies," Review of Economic Dynamics, Elsevier for the Society for Economic Dynamics, vol. 8(2), pages 452-479, April. [Downloadable!] (restricted)
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  2. Alexis Anagnostopoulos & Italo Bove & Karl Schlag & Omar Licandro, 2006. "An Evolutionary Theory of Inflation Inertia," Working Papers 2006-25, FEDEA. [Downloadable!]
    Other versions:
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This page was last updated on 2008-7-30.

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