on the demand estimation we find that consumer valuation of FTTH broadband in 2013 increased over time while ADSL lost on …This paper estimates demand for quadruple play mobile tariffs using a database of subscribers to a single mobile …

of a dominant firm. A system of simultaneous equations is developed and direct estimation of the incumbent's residual … demand function is performed by instrumenting the market price by incumbent-specific cost shifting variables as well as other … residual demand is inelastic (long run price elasticity of residual demand of -0.12). Such a level of elasticity is shown to be …