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Policy with Stochastic Hysteresis

Author

Listed:
  • Georgii Riabov
  • Aleh Tsyvinski

Abstract

The paper develops a general methodology for analyzing policies with path-dependency (hysteresis) in stochastic models with forward looking optimizing agents. Our main application is a macro-climate model with a path-dependent climate externality. We derive in closed form the dynamics of the optimal Pigouvian tax, that is, its drift and diffusion coefficients. The dynamics of the present marginal damages is given by the recently developed functional Itô formula. The dynamics of the conditional expectation process of the future marginal damages is given by a new total derivative formula that we prove. The total derivative formula represents the evolution of the conditional expectation process as a sum of the expected dynamics of hysteresis with respect to time, a form of a time derivative, and the expected dynamics of hysteresis with the shocks to the trajectory of the stochastic process, a form of a stochastic derivative. We then generalize the results. First, we propose a general class of hysteresis functionals that permits significant tractability. Second, we characterize in closed form the dynamics of the stochastic hysteresis elasticity that represents the change in the whole optimal policy process with an introduction of small hysteresis effects. Third, we determine the optimal policy process.

Suggested Citation

  • Georgii Riabov & Aleh Tsyvinski, 2021. "Policy with Stochastic Hysteresis," NBER Working Papers 28712, National Bureau of Economic Research, Inc.
  • Handle: RePEc:nbr:nberwo:28712
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    Cited by:

    1. d'Artis Kancs, 2024. "Uncertainty of supply chains: Risk and ambiguity," The World Economy, Wiley Blackwell, vol. 47(5), pages 2009-2033, May.

    More about this item

    JEL classification:

    • E0 - Macroeconomics and Monetary Economics - - General
    • H23 - Public Economics - - Taxation, Subsidies, and Revenue - - - Externalities; Redistributive Effects; Environmental Taxes and Subsidies
    • Q4 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Energy
    • Q5 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Environmental Economics
    • Q54 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Environmental Economics - - - Climate; Natural Disasters and their Management; Global Warming

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