A Robust Share-of-Choice Model

In this paper, we propose an approach to take into account, in a robust way, part-worth uncertainty share-of-choice (SOC) model. More precisely, extend the method proposed by Wang and Curry endogenously including competition. Indeed their approach, competition is described exogenously model cannot account for competition’s products. Our extension permits us all effects of uncertainty, even those relative competition, therefore improve substantially Curry’s approach.