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...

Ce travail est constitue de deux parties. Dans un premier temp, nous etudions un modele ou les actifs sont des projets d'investissements decrits par leurs flux. Ceux-ci sont modelises par des processus stochastiques dont la dynamique est decrite par un arbre binomial. Les investissements ont la...

While gender gaps in average math performance are close to zero in developed countries, women are still strongly underrepresented among math high performers. Using data from five successive waves of the Programme for International Student Assessment (PISA), we show that this underrepresentation...