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Price Levels in Heterogeneous-Agent Models

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  • Felix Hofer

Abstract

We study a model of the Fiscal Theory of the Price Level (FTPL) in a Bewley-Huggett-Aiyagari framework with heterogeneous agents. The model is set in continuous time, and ex post heterogeneity arises due to idiosyncratic, uninsurable income shocks. Such models have a natural interpretation as mean-field games, introduced by Huang, Caines, and Malham\'e and by Lasry and Lions. We highlight this connection and discuss the existence and multiplicity of stationary equilibria in models with and without capital. Our focus is on the mathematical analysis, and we prove the existence of two equilibria in which the government runs constant primary deficits, which in turn implies the existence of multiple price levels.

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  • Felix Hofer, 2025. "Price Levels in Heterogeneous-Agent Models," Papers 2510.26065, arXiv.org.
    • Handle: RePEc:arx:papers:2510.26065
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