Social security in the coming decade: questions for a mature system.
D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D004651:Employment; D005380:Financing, Government; D006801:Humans; D007182:Income; D007223:Infant; D008875:Middle Aged; D012179:Retirement; D012943:Social Security; D014481:United States; D014930:Women