In this note we analyze the hedging property of an optimal portfolio with one risk-free asset and two risky assets. We make a restriction on the dependence between the two risky assets and show that the sign of the covariance is necessary and sufficient to set the relative investments in the two...

We study the effect of riskiness on optimal portfolio. As discussed by Levy (1992), the main drawback of the standard model witg ine decision variable and one risky asset developed over the last twenty-five years, following the contributions of Rothschild and Stiglitz (1970,1971) and Hadar and...

In this paper, we propose an empirical analysis of the presence of adverse selection in an insurance market. We first present a theoratical model of a market with adverse selection and we introduce different issues related to transaction costs, accident costs, risk aversion and moral hazard. We...

We discuss how to detect the informational content of household decisions among the explanatory variables of econometric models. Two applications to the choice of automobile insurance contracts and the demand for life insurance are provided. We show that the information provided by additional...

Recently, Caballi and Pomansky (1996) proposed a formal definition of mixed risk aversion and characterized stochastic dominance in presence of such utility functions. However they did not study comparative mixed risk aversion. In this note we give a sufficient condition for analytic comparative...

In this paper we show how a shift in a return distribution affects the composition of an optimal portfolio in the case of one riskless asset and two risky assets. We obtain that, in general, such a shift modifies the composition of the mutual fund. We also show that the separating conditions...

Information problems have a large role to play in insurance markets and the regulations governing these markets were in part designed to take such problems into account. Classification variables are usually the tools used to reduce adverse selection, whereas bonus-malus (or merit-rating) schemes...

In this paper, we propose an empirical analysis of the presence of adverse selection in an insurance market. We first present a theroetical model of a market with adverse selection and we introduce different issues related to transaction costs, accident costs, risk aversion and moral hazard. We...

In this paper we show how a shift in a return distribution affects the composition of an optimal portfolio in the case of one riskless asset and two risky assets. We obtain that, in general, such a shift modifies the composition of themutual fund. We also show that the separating conditions...

This paper attemps to rationalize the use of insurance covenants in financial contracts, and shows how external financing generates a demand for insurance by risk-neutral entrepreneurs. In our model, the entrepreneur needs external financing for a risky project that can be affected by an...