Aging and Old Age: New Perspectives

abilities activities advanced societies affect age conflicts age differences age strata age stratification age structure age system age-related aging processes Alex Inkeles Anne Foner associated attitudes baby boom behavior benefits biological changes cross-section studies decline dependency ratio depression developed divorce economic elderly parents empty nest example factors functioning Gerontology grow older important income increase influenced intergenerational involved Jerome Kagan labor force participation large number later less levels lives longitudinal studies losses Louis Harris major marital marriage married Matilda White Riley menarche middle-aged modern societies number of older old age older cohorts older people's older person older population older women older workers organizations particular patterns pension percent period physical physiological political preindustrial societies problems programs proportion psychological relationships relatively retirement sixty-five social aging social roles Social Security spouse status successive cohorts United voluntary associations widowed widowhood young younger adults younger cohorts