Napp, Clotilde; Jouini, Elyès - Université Paris-Dauphine (Paris IX) - 2005
In securities markets, the characterization of the absence of arbitrage by the existence of state price deflators is generally obtained through the use of the Kreps–Yan theorem.This paper deals with the validity of this theorem (see Kreps, D.M., 1981. Arbitrage and equilibrium in economies...