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Marginal versus Average Beta of Equity under Corporate Taxation

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  • Lund, Diderik

    () (Dept. of Economics, University of Oslo)

Abstract

Even for fully equity-financed firms there may be substantial effects of taxation on the after-tax cost of capital. Among the few studies of these effects, even fewer identify all effects correctly. When marginal investment is taxed together with inframarginal, marginal beta differs from average if there are investmentrelated deductions like depreciation. To calculate asset betas, one should not only "unlever" observed equity betas, but "untax" and "unaverage" them. Risky tax claims are valued as call options, with closed-form solutions for the exercise probability. Results have practical relevance for multinationals operating under different tax systems.

Suggested Citation

  • Lund, Diderik, 2009. "Marginal versus Average Beta of Equity under Corporate Taxation," Memorandum 12/2009, Oslo University, Department of Economics.
    • Handle: RePEc:hhs:osloec:2009_012
    as

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    File URL: https://www.sv.uio.no/econ/english/research/unpublished-works/working-papers/pdf-files/2009/Memo-12-2009.pdf
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    References listed on IDEAS

    as
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    More about this item

    Keywords

    Cost of capital; WACC; loss offset; tax shields; options;

    JEL classification:

    • F23 - International Economics - - International Factor Movements and International Business - - - Multinational Firms; International Business
    • G31 - Financial Economics - - Corporate Finance and Governance - - - Capital Budgeting; Fixed Investment and Inventory Studies
    • H25 - Public Economics - - Taxation, Subsidies, and Revenue - - - Business Taxes and Subsidies

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