In this paper, we characterize subjective probability beliefs leading to a higher equilibrium market price of risk. We establish that Abel's result on the impact of doubt on the risk premium is not correct in general; see Abel [2002. An exploration of the effects of pessimism and doubt on asset...

Under some minimal assumptions on the price functional, we prove that the prices of the contingent claim are necessarily in some minimal interval.

We consider a model in which all investment opportunities are decribed in termes of cash flows. Our investment opportunities as assumed to be very general: they don't necessarily involve two dates and are not specifically related to a market model.

Dans ce travail, nous proposons un cadre general pour les modeles discrets et finis. Tout d'abord, nous montrons un resultat d'absence d'arbitrage. Puis, nous l'appliquons afin de retrouver les resultats deja connus sur les couts de transaction et les contraintes de vente a decouvert, pour des...

An agent's optimization problem of the expected terminal wealth utility in a trinomial tree economy is solved. At each transaction date, the agent can trade in a riskless asset, a primitive asset subject to constant proportional transaction costs, and a contingent claim characterized by some...

This paper investigates necessary conditions for an equilibrium to exist on a reinsurance market with short sale constraints. It establishes that, equilibrium, there exists an equivalent probability measure under which the reinsurance premium is the compensator of the jump process describing the...