Geography of the Family
研究利他主义下兄弟姐妹对父母居住地的选择，发现长子/女会住得比次子/女更远，并用德国数据验证了这一理论预测。
We study the residential choice of siblings who are altruistic towards their parents. The firstborn child's location choice influences the behavior of the second-born child and can shift some of the burden of providing care for the parents from one child to the other. These strategic considerations lead to an equilibrium location pattern with firstborn children locating further away from their parents than second-born children. We also analyze the location choices empirically using German data. These data confirm our theoretical predictions.