This paper studies the optimal financing (capital structure) of entrepreneurial activity in the context of "risk-aversion" by incorporating the deadweight costs of bankruptcy and taxes. Unlike the extreme debt ratio (corner solution) predicted by scholars using linear models, this paper provides unique interior results for risk-free as well as risky debt, irrespective of corporate taxes. The paper also shows the necessary and sufficient conditions for both forms of debt, and the pareto-optimality of one over the other. The important findings of this paper are: (i) the existence of an equilibrium, where the borrowing interest rate is greater than the lending rate, despite the violation of Fisher separation theorem (1930); (ii) wealth plays a critical role in determining the debt ratio and the equilibrium risk-free rate of interest, complementing the De Meza and Webb (1987 and 1999) studies; (iii) an explanation for the preferred stock and income bond puzzles, extending Fooladi et al. (1991) and McConnell and Schlarbaum (1991). Copyright Blackwell Publishers Ltd 2000.
