4[3]Tu, E. J., Liang, J. & Li, S. (1989). Mortality decline and the Chinese family structure: Implications for old age support[J]. Journal of Gerontology, 44(4), 157-168.
5[4]Wedderburn, D. (1968). The financial resources of older people: a general review[A]. In E. Shanas, et al. (Eds.), Old people in three industrial societies[M]. New York: Atherton Press.
6[5]Schulz, J. H. (1979). The economics of aging[M].Belmond CA: Wadsworth Publishing Company, Inc.
7[6]Bernstein, N. C. & Bernstein, J. B. (1988). Social Security: the system that works[M]. New York: Basic Books, Inc., Publishers.
8[7]中国老龄科学研究中心.中国老年人供养体系调查数据汇编[Z].北京:华龄出版社,1994.
9[8]Kitagawa, E. M. (1964). Standardized comparisons in population research[J]. Demography, 1(1), 296-315.
10[9]Pillai, V.K (1987). Postwar Rise and decline of American fertility: The Pacew of Transition to Motherhood among 1950-1969 Marital Cohorts of White Women[J]. Journal of Family History, 12 (4), 421-436.
