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Asset Prices and Efficiency in a Krebs Economy

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  • Alexis Akira Toda

    (University of California San Diego)

Abstract

I study the asset pricing implications and the efficiency of a tractable dynamic stochastic general equilibrium model with heterogeneous agents and incomplete markets along the lines of Krebs [Krebs, T., 2003. Human Capital Risk and Economic Growth. Quarterly Journal of Economics 118(2), 709-744]. Contrary to previous applications of these types of models, I find that generically the distribution of idiosyncratic shocks affects the risk premia of aggregate shocks and that the equilibrium is constrained inefficient in the sense that a planner can Pareto improve the equilibrium outcome by assigning different portfolio choices to agents. The inefficiency is caused by a 'portfolio externality': the average portfolio of the economy affects the portfolio return of each agent. The constrained efficient outcome can be achieved through linear taxes and subsidies that I characterize in closed-form. (Copyright: Elsevier)

Suggested Citation

  • Alexis Akira Toda, 2015. "Asset Prices and Efficiency in a Krebs Economy," Review of Economic Dynamics, Elsevier for the Society for Economic Dynamics, vol. 18(4), pages 957-978, October.
    • Handle: RePEc:red:issued:13-196
    DOI: 10.1016/j.red.2014.11.003
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    20. Toda, Alexis Akira, 2014. "Incomplete market dynamics and cross-sectional distributions," Journal of Economic Theory, Elsevier, vol. 154(C), pages 310-348.
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    Citations

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    Cited by:

    1. Alexis Akira Toda & Kieran James Walsh, 2017. "Fat tails and spurious estimation of consumption‐based asset pricing models," Journal of Applied Econometrics, John Wiley & Sons, Ltd., vol. 32(6), pages 1156-1177, September.
    2. Krebs, Tom & Scheffel, Martin, 2016. "Quantifizierung der gesamtwirtschaftlichen Effekte ausgewählter Reformvorschläge der Studie "Reforms, Investment and Growth: An Agenda for France, Germany and Europe"," Working Papers 16-04, University of Mannheim, Department of Economics.
    3. Toda, Alexis Akira, 2019. "Wealth distribution with random discount factors," Journal of Monetary Economics, Elsevier, vol. 104(C), pages 101-113.
    4. Tom Krebs & Martin Scheffel, 2024. "Optimal allocations in growth models with private information," Economic Theory, Springer;Society for the Advancement of Economic Theory (SAET), vol. 78(1), pages 125-154, August.
    5. Sakai Ando, 2017. "Size-Dependent Policies and Efficient Firm Creation," ISER Discussion Paper 1033, Institute of Social and Economic Research, Osaka University, revised Jun 2018.
    6. Ando, Sakai & Matsumura, Misaki, 2020. "Constrained inefficiency of competitive entrepreneurship," Journal of Mathematical Economics, Elsevier, vol. 88(C), pages 98-103.
    7. Tom Krebs & Moritz Kuhn & Mark Wright, 2017. "Under-Insurance in Human Capital Models with Limited Enforcement," Review of Economic Dynamics, Elsevier for the Society for Economic Dynamics, vol. 25, pages 121-150, April.

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    More about this item

    Keywords

    AK models; Constrained efficiency; Externality; Idiosyncratic risk; Incomplete markets; Optimal taxation;
    All these keywords.

    JEL classification:

    • D52 - Microeconomics - - General Equilibrium and Disequilibrium - - - Incomplete Markets
    • D58 - Microeconomics - - General Equilibrium and Disequilibrium - - - Computable and Other Applied General Equilibrium Models
    • E21 - Macroeconomics and Monetary Economics - - Consumption, Saving, Production, Employment, and Investment - - - Consumption; Saving; Wealth
    • E22 - Macroeconomics and Monetary Economics - - Consumption, Saving, Production, Employment, and Investment - - - Investment; Capital; Intangible Capital; Capacity
    • G11 - Financial Economics - - General Financial Markets - - - Portfolio Choice; Investment Decisions
    • H21 - Public Economics - - Taxation, Subsidies, and Revenue - - - Efficiency; Optimal Taxation
    • H23 - Public Economics - - Taxation, Subsidies, and Revenue - - - Externalities; Redistributive Effects; Environmental Taxes and Subsidies

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