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Refining the Truncation Method to Solve Heterogeneous-Agent Models

Author

Listed:
  • François Le Grand

    (EM - EMLyon Business School, D-ERDW - Departement Erdwissenschaften [ETH Zürich] - ETH Zürich - Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich])

  • Xavier Ragot

    (ECON - Département d'économie (Sciences Po) - Sciences Po - Sciences Po - CNRS - Centre National de la Recherche Scientifique, CNRS - Centre National de la Recherche Scientifique, OFCE - Observatoire français des conjonctures économiques (Sciences Po) - Sciences Po - Sciences Po)

Abstract

We present a refinement of the uniform truncation method of LeGrand and Ragot (2022) to solve heterogeneous-agent models with aggregate shocks. The method consists in providing a finite state-space representation of such economies by truncating idiosyncratic histories. The innovation compared to the uniform method is to allow for truncated histories of different lengths. This offers a finer representation when needed, while considerably reducing the model dimensionality. The method reproduces the steady-state distribution of any heterogeneous-agent model and solves for its dynamics in the presence of aggregate shocks. As with the uniform method, the refined method can be solved using perturbation methods and hence implemented with standard software, such as Dynare. We show that the refined truncation method provides accurate results that improve on those of the uniform method.

Suggested Citation

  • François Le Grand & Xavier Ragot, 2022. "Refining the Truncation Method to Solve Heterogeneous-Agent Models," Post-Print hal-03949528, HAL.
    • Handle: RePEc:hal:journl:hal-03949528
    DOI: 10.2307/48674139
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    Keywords

    Heterogeneous Agents; Truncation Method; Aggregate Shocks;
    All these keywords.

    JEL classification:

    • D31 - Microeconomics - - Distribution - - - Personal Income and Wealth Distribution
    • D52 - Microeconomics - - General Equilibrium and Disequilibrium - - - Incomplete Markets
    • E21 - Macroeconomics and Monetary Economics - - Consumption, Saving, Production, Employment, and Investment - - - Consumption; Saving; Wealth

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