High rates of contract renegotiation have raised serious questions about the viability of the concession model to attract private participation in infrastructure in developing countries. After extending in reduced form a standard regulation model, in which renegotiation occurs due to the...

Based on an entrepreneurial model having historical roots in Knight (1921), a competitive general equilibrium theory of the firm under uncertainty is constructed. The expected utility maximization criterion is used and justified by assuming that for each firm there is an expected utility...