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Sectoral inflation persistence, market concentration and imperfect common knowledge

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  • Ryo Kato
  • Tatsushi Okuda
  • Takayuki Tsuruga

Abstract

Previous studies have stressed that inflation dynamics exhibit a substantial dispersion across sectors. Using US producer price data, we present evidence that sectoral inflation persistence is negatively correlated with market concentration, which is difficult to reconcile with the prediction of the standard model of monopolistic competition. To explain the data, we incorporate imperfect common knowledge into the monopolistic competition model introduced by Melitz and Ottaviano (2008). In the model, strategic complementarity among firms increases as market concentration decreases. Because higher strategic complementarity generates greater inflation persistence, our model successfully replicates the observed negative correlation between inflation persistence and market concentration across sectors.

Suggested Citation

  • Ryo Kato & Tatsushi Okuda & Takayuki Tsuruga, 2020. "Sectoral inflation persistence, market concentration and imperfect common knowledge," ISER Discussion Paper 1082, Institute of Social and Economic Research, Osaka University.
    • Handle: RePEc:dpr:wpaper:1082
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    JEL classification:

    • E31 - Macroeconomics and Monetary Economics - - Prices, Business Fluctuations, and Cycles - - - Price Level; Inflation; Deflation
    • D40 - Microeconomics - - Market Structure, Pricing, and Design - - - General
    • L16 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Industrial Organization and Macroeconomics; Macroeconomic Industrial Structure

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