This may indicate that if hospitals are dependent on Medicare or Medicaid revenues (as reflected in higher levels of Medicare share or Medicaid share), changes in reimbursement policy may create more environmental turbulence that affects the subsidization of indigent care. Alternatively, it may mean that a greater proportion of Medicare and Medicaid coverage of a hospital’s patient population implies a smaller share of patients that are uninsured and thus less need for uncompensated care.