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Public Finance in a Nutshell: A Cobb Douglas Teaching Tool for General Equilibrium Tax Incidence and Excess Burden

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  • Don Fullerton
  • Chi L. Ta

Abstract

To help first- or second-year graduate students in economics apply their theoretical training, this paper shows how to solve a simple and intuitive computable general equilibrium (CGE) model using a calculator. Because this simplified Harberger model uses Cobb Douglas functional forms for utility and production, one can solve for all input and output prices and quantities with no taxes and then solve for exact measures of output with a large tax change (not using derivatives). We then show how to solve simultaneously for capital and labor prices (incidence on the sources side of income), for both output prices (incidence on the uses side), for exact measures of overall welfare loss such as the equivalent variation, for excess burden and marginal excess burden, and for the effects on revenue in the form of a Laffer Curve.

Suggested Citation

  • Don Fullerton & Chi L. Ta, 2017. "Public Finance in a Nutshell: A Cobb Douglas Teaching Tool for General Equilibrium Tax Incidence and Excess Burden," National Tax Journal, National Tax Association;National Tax Journal, vol. 70(1), pages 155-170, March.
    • Handle: RePEc:ntj:journl:v:70:y:2017:i:1:p:155-170
    DOI: 10.17310/ntj.2017.1.06
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    References listed on IDEAS

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    1. Bradford, David F., 1978. "Factor prices may be constant but factor returns are not," Economics Letters, Elsevier, vol. 1(3), pages 199-203.
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    4. Gahvari, Firouz, 1988. "Does the Laffer Curve Ever Slope Down?," National Tax Journal, National Tax Association;National Tax Journal, vol. 41(2), pages 267-269, June.
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    More about this item

    JEL classification:

    • A20 - General Economics and Teaching - - Economic Education and Teaching of Economics - - - General
    • C63 - Mathematical and Quantitative Methods - - Mathematical Methods; Programming Models; Mathematical and Simulation Modeling - - - Computational Techniques
    • C68 - Mathematical and Quantitative Methods - - Mathematical Methods; Programming Models; Mathematical and Simulation Modeling - - - Computable General Equilibrium Models
    • D04 - Microeconomics - - General - - - Microeconomic Policy: Formulation; Implementation; Evaluation
    • D58 - Microeconomics - - General Equilibrium and Disequilibrium - - - Computable and Other Applied General Equilibrium Models
    • H21 - Public Economics - - Taxation, Subsidies, and Revenue - - - Efficiency; Optimal Taxation
    • H22 - Public Economics - - Taxation, Subsidies, and Revenue - - - Incidence
    • H23 - Public Economics - - Taxation, Subsidies, and Revenue - - - Externalities; Redistributive Effects; Environmental Taxes and Subsidies
    • H24 - Public Economics - - Taxation, Subsidies, and Revenue - - - Personal Income and Other Nonbusiness Taxes and Subsidies
    • H25 - Public Economics - - Taxation, Subsidies, and Revenue - - - Business Taxes and Subsidies

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