Analysis On Discrepancy Between Theoretical and Practical Old-age Dependent Ratios
Xiao Zhouyan
Population Research . 2004, (3): 38 -43 . 

Copyright © Population Research, All Rights Reserved.
Tel: 010-62511320　Fax: 010-62511320　E-mail: rkyj@ruc.edu.cn
Powered by Beijing Magtech Co., Ltd.