主题：Two-fold Varying-coefficient Mediation Models and Their Applications
主讲人：王文武 曲阜师范大学
主持人：王国长 暨南大学
时间：2025年7月4日（周五）下午16:40-17:40
地点：暨南大学石牌校区经济学院（中惠楼）102室
摘要
Mediation analysis provides a technical approach to reveal the complex relationships between the variables, in such a way to distinguish more targeted interventions for different individuals and different scenario conditions. In real applications, the strength of causal effect between the variables is often influenced by many other variables. Yet in the literature, there are few studies on multiple mediation analysis to explore in this direction. Inspired by this, we study the two-fold varying-coefficient mediation model by proposing two influence mechanisms involving two mediators. Specifically, the first mechanism considers a parallel two-fold varying-coefficient mediation model where the two mediators operate in parallel, and the second one considers a chain two-fold varying-coefficient mediation model where the two mediators function sequentially. Further by regarding the coefficient functions as smooth functions, we derive the spline estimators for both the direct and indirect effects, as well as establish the asymptotic normality of all or part of the estimators. Simulation results show that our new models and methods perform very well, and they are also able to capture the dynamic changes of the coefficient functions in the two real data examples.
主讲人简介
王文武，曲阜师范大学统计与数据科学学院教授、博士生导师；校统计学研究所副所长，院研究生工作负责人；香港大学博士后研究员，香港浸会大学访问学者。研究兴趣包含：非参数统计、稳健统计、机器学习与人工智能、因果效应评估等。目前，主持国家自然科学基金面上项目1项、山东省自然科学基金面上项目1项。已发表SCI/SSCI/CSSCI论文20余篇，包括：Computational Statistics & Data Analysis (2篇)、Journal of Hazardous Materials、Journal of Machine Learning Research (2篇)、Knowledge-Based Systems、Psychometrika、Statistics in Medicine、Structural Equation Modeling、TEST等学术期刊。
欢迎感兴趣的师生参加！
校对|王国长
责编| 彭毅
初审| 姜云卢
终审发布| 何凌云
（来源：暨南大学经济学院微信公众号）
