“…With the introduction of managed care and price competition, the economic incentives facing hospitals changed dramatically, which probably has affected EDs as well. [16][17][18][19][20][21][22][23][24][25][26][27] Other recent factors also may have affected ED cost structures, such as Emergency Medical Treatment and Active Labor Act regulations, nursing shortages, higher malpractice insurance costs that hospitals sometimes subsidize from their administrative budgets, and possibly other physician retention-related expenses.…”