研究生workshop由首都经济贸易大学国际经济管理学院主办。主要内容：一是研究生报告前沿或经典文献，二是研究生报告自己的研究或研究设想。论坛宗旨是：为学院师生搭建一个学术交流平台，营造浓厚学术氛围；通过对经典论著或前沿文献的研讨，拓宽研究生的理论视野，提升研究生的前沿方法运用能力，帮助研究生提高论文写作质量。

　　本期workshop

　　报告人：丘锦波（2022级博士研究生）

　　导师：李委明

　　报告论文：《退休年龄、隔代抚养与经济增长》经济学（季刊）, 2021

　　作者：郭凯明、余靖雯、龚六堂

　　

　　报告摘要：

　　本文研究了退休年龄通过隔代抚养机制对经济增长的影响,提出延迟退休年龄挤出了年老人的隔代抚养时间,对人力资本产生两个方向相反的影响:一方面提高了年轻人生育机会成本,在数量和质量替代关系的作用下,年轻人提高子女的平均教育投入,从而促进人力资本积累;另一方面降低了年轻人劳动供给时间,在干中学效应的作用下,年轻人更慢积累工作经验,从而阻碍人力资本积累。在这两种渠道作用下,存在使经济增长最快的最优退休年龄。

　　

　　报告人：郑雅璇（2022级博士研究生）

　　导师：李鲲鹏

　　报告论文：《Estimating and Testing Linear Models with Multiple Structural Changes》Econometrica, 1998《多结构变化线性模型的估计和检验》

　　

　　报告摘要：

　　This paper considers issues related to multiple structural changes, occurring at unknown dates, in the linear regression model estimated by least squares. The main aspects are the properties of the estimators, including the estimates of the break dates, and the construction of tests that allow inference to be made about the presence of structural change and the number of breaks. We consider the general case of a partial structural change model where not all parameters are subject to shifts. We study both fixed and shrinking magnitudes of shifts and obtain the rates of convergence for the estimated break fractions. We also propose a procedure that allows one to test the null hypothesis of, say, l changes, versus the alternative hypothesis of l+1 changes. This is particularly useful in that it allows a specific to general modeling strategy to consistently determine the appropriate number of changes present. An estimation strategy for which the location of the breaks need not be simultaneously determined is discussed. Instead, our method successively estimates each break point.