. There are two firms, an incumbent and a potential entrant. Compatibility means in our model that the inherent qualities of … maximal quality difference that allows compatibility i.e the compatibility interval is chosen by the incumbent which involves … sufficient condition on the market size of a standard vertical differentiation model remains valid under compatibility. However …

adopt new strategies : merger, simple or mutual links of interoperability. We develop a model of industrial organization to … the interoperability agreements are never reached at the equilibrium in spite of the fact that the "European code of good …