Noll, R. van der

price channel consumer market equilibrium internet information insurance selection entrant model sulfh effect frqvxphuv technology candidate store contract product result increase welfare incentive entry decrease shopping probability competition incumbent committee lqwhuqhw number paper section search ability figure strategy application profit selection technology fkdqqho inequality contest rqolqh utility value htxloleulxp channel substitution example wkhuh vwruh proof risk aversion parameter pdunhw f / t proposition decision sulfhv uncertainty convenience condition firm 1 expression prize player applicant purchase discrimination implication study market size level bricks-and-mortar firms vhdufk insurer shopping convenience retailer analysis