We extend the WACC approach to a tax system having a firm income tax and a personal income tax of the investor as well. We use an artificial tax system incorporating most of the G-7 national tax codes as for example the classical or the imputation systems.

This paper attempts to analytically determine the impact a tax shield (marginal tax rate) has on the value of a levered firm assuming that gains and losses are taxed differently. Previous research has done this by employing empirical methods and simulation studies. We are able to present...