Martinez-Giralt, Xavier; Barros, Pedro Pita - Departament d'Economia i Història Econòmica, … - 2000
-called "any willing provider" where the third-party payer announces a contract and every provider freely decides to sign it or not … high the third-party payer prefers the any willing provider system. When, on the contrary, the surplus is relatively low …-party payer prefers the any willing provider system.
When, on the contrary, the surplus is relatively low, the third-party payer …