三位牛人所写，

清华的li hongbin
港中文的 zhang junsen
yale的 rosenzweig

这个版本是working paper，马上就会发在JPE上了。。。

文章讨论了 “一子”和“二子”的模型，数据是2002年的双胞胎调研（五个城市，成都、重庆、武汉、哈尔滨和合肥）。MZ是同卵双胞胎，DZ是异卵双胞胎。

结论还是很有意思的，上山下乡时间长的、受教育程度低的、结婚时条件比较差的孩子受到家长更多的照顾。这基本符合中国的实际情况。

计量上而言本文的技术难度属于中等。但是创意很好，而且模型阐述也非常清楚，没有故弄玄虚。最关键的是这个题目很有意思，分享给大家。

Abstract

In this paper, we use new survey data on twins born in urban China, among whom many
experienced the consequences of the forced mass rustication movement of the Chinese “cultural
revolution,” to identify the distinct roles of altruism and guilt in affecting behavior within
families. Based on a model depicting the choices of the allocation of parental time and transfers
to multiple children incorporating favoritism, altruism and guilt, we show the conditions under
which guilt and altruism can be separately identified by experimental variation in parental time
with children. Based on within-twins estimates of affected cohorts, we find that parents selected
children with lower endowments to be sent down; that parents behaved altruistically, providing
more gifts to the sibling with lower earnings and schooling; but also exhibited guilt – given the
current state variables of the two children, the child experiencing more years of rustication
received significantly higher transfers.
Key Words: Guilt, Altruism, China
JEL Codes: J12, J13, O12

因为有敏感词汇，所以我没有贴摘要，呵呵。。。

很有意思的一篇文章