Health care in a longitudinal panel before and after Medicare.
D000368:Aged; D005260:Female; D005102:Health Expenditures; D006306:Health Surveys; D006760:Hospitalization; D006801:Humans; D007182:Income; D008297:Male; D006278:Medicare; D008875:Middle Aged; D009790:Occupations; D010548:Personal Health Services / Q000706:statistics & numerical data*; D013997:Time Factors; D014481:United States