Buytendijk, J.

health specialist income netherland difference inequity utilisation belgium hospital country insurance health care doorslaer supply group service health insurance coverage income groups coverage van doorslaer e geurts j system indices care utilisation buytendijk j belgian number patient level variable effect copayment table survey inequality distribution specialist services health care utilisation visit degree insurance coverage density regression equity basis dutch access result contact health care use specialist care characteristic delivery geurt sickness concentration buytendijk population hospital beds income individuals interview inequity indices sickness fund referral wagstaff pro-rich inequity specialist contacts availability health economics curve care use sp écialistes gebruik doctor individual value hospital admissions extent van doorslaer hiwv indices