三孩政策实施前后山东某县出生人数和三孩及以上孩次占比研究

谭小玉, 赵立华, 周玉博, 金彩芹, 刘扬, 郑爱妮, 李爱红, 李宏田, 刘建蒙

The number of births and the proportion of births of the third child and above in a county in Shandong before and after the implementation of the three-child policy

TAN Xiaoyu, ZHAO Lihua, ZHOU Yubo, JIN Caiqin, LIU Yang, ZHENG Aini, LI Aihong, LI Hongtian, LIU Jianmeng