标题：Dependency rates and savings rates
[size=-1]作者：[size=-1]NH Leff -
[size=-1]期刊：[size=-1]The American Economic Review, 1969
[size=-1]链接：http://www.jstor.org/pss/1810683
标题：The saving of the elderly in micro and macro data
[size=-1]作者：DN Weil -
[size=-1]期刊：The Quarterly Journal of Economics, 1994
[size=-1]链接：http://www.jstor.org/pss/2118428- JSTOR