RT Monograph SR 00 A1 Cremer, Helmuth A1 De Donder, Philippe A1 Dudley, Paul A1 Rodriguez, Frank T1 Welfare and Pricing of Mail in a Communications Market YR 2010 FD 2010-04-02 VO 10-148 SP 24 AB We build a model where a postal incumbent offering single piece, transactional and advertising mail competes with postal entrants and with a firm offering an alternative medium. We solve for the optimal prices under various competition assumptions. We calibrate the model and provide numerical simulations in order to shed light on the impact of these assumptions on volumes and welfare levels. T2 TSE Working Paper PB TSE Working Paper PP Toulouse AV Published LK https://publications.ut-capitole.fr/id/eprint/3344/ UL http://tse-fr.eu/pub/22482