1 is dietetic more salubrious than biological an analysis of italian jam market tiziano razzolini university turin abstract this article analyzes competition in the for jams which characterized by multiple dimensions differentiation focuses on impact two particular both potentially important from a salutary point view nature product and its features ie content sugar demand parameters are estimated nested logit model where hierarchical order to compulsory bresnahan stern trajtenberg 1997 products allowed share simultaneously estimation latter specification eased using analytical expression mean evaluation parameter as function shares jel codes l11 l15 l66 introduction literature has exhibited great developments during last ten years including proliferation new methods analyze consumers within discrete choice framework since information consumption often limited aggregate data studies preferences require design models able cope with
