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The Value of the Firm Under Regulation

Listed author(s):
  • Jeffrey F. Jaffe
  • Gershon Mandelker

The basic theoretical relationships between the value of the firm and leverage were set forth by Modigliani and Miller (MM). Much work has tested the MM relationships empirically, including studies which used data from regulated industries. Gordon has stated that, because earnings before interest and taxes are not held constant in regulated industries, the MM formula used in empirical work is invalid. However, Elton-Gruber (EG) challenge Gordon’s statement. The present paper shows that both the Gordon and the EG formulae hold only under special conditions. Under "normal" conditions of demand, both formulae underestimate the value of the levered firm. We show that there is no a priori method of estimating the effect of leverage on the value of a regulated firm without knowledge of specific supply and demand conditions. As researchers do not usually know these conditions, the results of papers testing the MM propositions with data on regulated industries are ambiguous. General formulae for the discount rate and the valuation of a levered firm in a regulated industry are presented.

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Paper provided by Wharton School Rodney L. White Center for Financial Research in its series Rodney L. White Center for Financial Research Working Papers with number 14-75.

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Date of creation:
Handle: RePEc:fth:pennfi:14-75
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