Abstract

http://ssrn.com/abstract=1715044
 
 

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Corporation Income Taxes and the Cost of Capital: A Revision


James W. Kolari


Texas A&M University - Department of Finance

Ignacio Velez-Pareja


Master Consultores

November 25, 2010

Innovar, 22(46), 53-72. 2012
Mays Business School Research Paper No. 2012-31

Abstract:     
The value of debt tax shields in foundational corporate valuation models by Nobel Laureates Modigliani and Miller (MM) continues to be a controversial issue that is central to our understanding of corporate finance. This paper argues that a fundamental valuation problem exists in the MM tax models. To overcome this problem, we propose a revision to their now famous tax correction model that yields much smaller tax gains on debt usage. Rather than discounting tax shields from debt interest payments using a riskless interest rate or unlevered equity rate, due to implausible valuation results implicit in this approach, the levered cost of equity is employed. Assuming no bankruptcy risk and no personal taxes, the proposed revised tax model yields an inverted U-shaped firm value function with an interior optimal capital structure. Analyses are extended to Miller’s personal tax extension of MM’s tax model. Also, implications to corporate capital structure decisions and previous literature are discussed.

Number of Pages in PDF File: 19

Keywords: Value of Tax Shields, Capital Structure, Firm Valuation, Share Valuation

JEL Classification: G12, G31, G32

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Date posted: November 25, 2010 ; Last revised: June 1, 2013

Suggested Citation

Kolari, James W. and Velez-Pareja, Ignacio, Corporation Income Taxes and the Cost of Capital: A Revision (November 25, 2010). Innovar, 22(46), 53-72. 2012; Mays Business School Research Paper No. 2012-31. Available at SSRN: http://ssrn.com/abstract=1715044 or http://dx.doi.org/10.2139/ssrn.1715044

Contact Information

James W. Kolari (Contact Author)
Texas A&M University (TAMU) - Department of Finance ( email )
351R Wehner
Department of Finance
College Station, TX 77843-4218
United States
979-845-4803 (Phone)
979-845-3884 (Fax)

Ignacio Velez-Pareja
Master Consultores ( email )
Ave Miramar # 18-93 Apt 6A
Cartagena
Colombia
+575 690 9972 (Phone)
HOME PAGE: http://cashflow88.com/decisiones/decisiones.html
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