Uncertain Costs and Vertical Differentiation in an Insurance Duopoly Staff Working Paper 2014-14 Radoslav Raykov Classical oligopoly models predict that firms differentiate vertically as a way of softening price competition, but some metrics suggest very little quality differentiation in the U.S. auto insurance market. Content Type(s): Staff research, Staff working papers Topic(s): Economic models, Market structure and pricing JEL Code(s): D, D4, D43, D8, D81, G, G2, G22, L, L2, L22