Medicare HMOs. Playing to an older crowd.
Nordhaus-Bike
A M
AM
D000368:Aged; D006279:Health Maintenance Organizations / Q000191:economics* / Q000706:statistics & numerical data; D006801:Humans; D015273:Insurance Selection Bias; D008389:Marketing of Health Services; D006278:Medicare / Q000639:trends*; D013240:Stereotyping; D014481:United States