English, Article, Journal or magazine article edition: The correct value of tax shields: An analysis of 23 theories Fernandez, Pablo

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Bookmark: http://trove.nla.gov.au/version/170612
Physical Description
  • preprint
Language
  • English

Edition details

Title
  • The correct value of tax shields: An analysis of 23 theories
Author
  • Fernandez, Pablo
Physical Description
  • preprint
Notes
  • This paper provides guidelines to evaluate the appropriateness of 23 different valuation methods for estimating the present value of tax shields. We first show that the value of tax shields is the difference between the present values of two different cash flows with their own risks: the present value of taxes for the unlevered company and the present value of taxes for the levered company. This implies, as a first guideline, that, for the particular case of a perpetuity and a world without costs of leverage, the value of tax shields is equal to the tax rate times the value of debt. The value of tax shields can be lower when costs of leverage exist. In that case, we show that, since the existence of leverage costs is independent of taxes, a second guideline for the appropriateness of the valuation method should be that the value of tax shields, when there are no taxes, is negative. We then look at the case of constant growth and derive similar conclusions. Second, we identify 23 valuation theories proposed in the literature to estimate the present value of tax shields and illustrate their performance relative to the proposed guidelines. Eight of these theories do not satisfy the two proposed guidelines for the case of perpetuities. Only one of the valuation methods is consistent with these restrictions when we look at the case of constant growth and no leverage costs. Two theories provide consistent valuations when we allow for leverage costs and growth. Finally, we use the 23 theories to value a hypothetical firm and show remarkable differences in the values obtained, which demonstrates the importance of using a method consistent with the proposed guidelines.
  • value tax shields; valuation theories; valuation methods;
  • RePEc:ebg:iesewp:d-0628
Language
  • English
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