This paper develops a theoretical model to analyze the firms' incentives to preannounce their new products. We consider a two-period model where a single firm controls the market with one product in the first period and a new and better product is introduced in the second period, either by the...

L'evaluation de l'impact economique des Technologies de l'Information (TI) doit se faire au niveau du projet de conception d'un nouveau Systeme d'Information (SI). Nous proposons un modele permettant d'apprehender le concept de valeur economique d'un projet de SI. Ce modele est applique par un...