Competition: answer for the 1980s?
D003256:Community Participation / Q000191:economics; D003695:Delivery of Health Care / Q000191:economics*; D016027:Heart Transplantation; D006801:Humans; D007349:Insurance, Health, Reimbursement; D008484:Medicaid / Q000191:economics; D006278:Medicare / Q000191:economics; D014481:United States