The great American fertility debate: generational balance and support of the aged.
D000368:Aged; D003710:Demography; D005298:Fertility; D006301:Health Services Needs and Demand / Q000639:trends*; D006302:Health Services Research / Q000639:trends*; D006299:Health Services for the Aged / Q000191:economics*; D006801:Humans; D014481:United States