“…The seminal contributions of Ellis and McGuire (); Ma (); Street, O'Reilly, Ward, and Mason (); among others show that hospital payment schemes based on full reimbursement of the incurred costs lead to a “medical arms race” among hospitals and, thus, to an escalation of health care costs (Cavalierie, Guccio, Lisi, & Pignataro, ); a prospective per case reimbursement system seems to be appropriate, to lead hospitals to more efficient choices. The empirical literature concerning the determinants and the effects of DRG prices (see, e.g., various chapters in Culyer & Newhouse, ; Pauli, McGuire, & Barros, ; see also Mikkala, Keskimaki, & Hakkinene, ; Schreyoegg, Stargardt, Tiemann, & Busse, ) show that the determinants of price levels typically include the estimated cost, taking into consideration different components, with a different weight of past history and prospective evolution, according to different countries.…”