Notes, Comments and Preliminary results Sep 17 2021 Olga Rozanova   The role of the government's participation constraint in the relationship between the price of the medicine and the patients' co-payment   Abstract  Contact Information  Citation  Full Text  -  Comment   Jul 16 2017 Olga Rozanova   The possibility to renegotiate the contracts and the equilibrium mode of competition in vertically related markets   Abstract  Contact Information  Citation  Full Text  -  Note