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Population and America's future
Spengler, Joseph J. - 1975
Persistent link: https://www.econbiz.de/10000116060
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Population change, modernization, and welfare
Spengler, Joseph J. - 1974
Persistent link: https://www.econbiz.de/10013476884
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Changing demography and dependency costs : the implications of future dependency ratios and their composition
Clark, Robert L.; Spengler, Joseph J. - In: Aging and income : programs and prospects for the elderly, (pp. 55-89). 1978
Persistent link: https://www.econbiz.de/10002001987
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Dependency ratios : their use in economic analysis
Clark, Robert L.; Spengler, Joseph J. - In: Research in population economics : a research annual 2 (1980), pp. 63-76
Persistent link: https://www.econbiz.de/10002001997
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The economics of individual and population aging
Clark, Robert L. - 1980
Persistent link: https://www.econbiz.de/10013493286