異時点間選択と消費・貯蓄、退職行動

我将习惯形成和父母利他主义结合起来，完成了我的理论研究计划的内容，并运用实证分析的方法对理论结论进行了考察。在我与池田教授共同研究的论文“值得感谢的父母利他主义和儿童的习惯形成”中，我们提出了一个与儿童习惯形成有关的父母利他主义模型，儿童在幼年时不知道自己的发展习惯，直到长大后才意识到这些习惯。我们表明，一个利他的母亲(i)保持转移给孩子的收入数量低于孩子的期望，（ii）在孩子表现出特定习惯的外生增加时减少进一步的收入转移。如果母亲足够富有和无私，孩子长大后可能会对小额收入转移心存感激：当以已实现的习惯偏好来评估时，小额收入转移导致的儿童福利要大于儿童所偏好的更大的收入转移所产生的福利。这意味着，在其他条件相同的情况下，来自富裕家庭的父母往往会防范孩子的挥霍。在另一项联合研究《严父母来自富裕家庭：实证研究》中，我们检验并验证了我们的理论模型中的假设，即富裕家庭中有习惯意识的人往往会严格管教孩子。利用日本“大阪大学偏好参数研究”的数据，我们发现在被调查者意识到习惯的情况下，被调查者严格的教养方式与其15岁时的生活水平之间存在显著的正相关关系。这一实证结果与我们的理论预测相一致。

I accomplished the contents of my theoretical research plan by incorporating habit formation and parental altruism, and investigated the theoretical conclusions by using empirical analysis.In my paper "Thankworthy Parental Altruism and Children' s Habit-Formation" which is based on the joint research with Professor Ikeda, we propose a model of parental altruism in relation with child habit formation, where children are unaware of their developing habits while young, and become cognizant of them only on growing up. We show that an altruistic mother (i) maintains the amount of income transferred to her child lower than the child would desire and (ii) reduces further income transfer upon an exogenous increase in the child's performance of a particular habit. The child, when grown, may end up grateful for the small income transfer if the mother is sufficiently rich and altruistic : when evaluated by the realized habitual preferences, a small income transfer leads to greater child welfare than the greater income transfer preferred by the child would have generated. This implies that parents from richer families, ceteris paribus, tend to guard against their children's profligacy.In another joint research "Strict Parents Come From Wealthy Families : An Empirical Study", We examine and verify the hypothesis from our theoretical model that people who are aware of habit tend to strictly upbring their children if they are from wealthy family. Using the data from "Preference Parameters Study of Osaka University" in Japan, we find that there are significantly positive relations between respondents' strict upbringing practices and their living standards when 15 years old in the case that respondents are aware of habit. This empirical result is consistent with our theoretical prediction.