4月9日下午2:30，南开经济研究所双周学术讨论会将举行。

本期讲座题目为：Belief Formation and Polarization under Biased Information Sources

欢迎老师、同学届时参加讲座。

主讲人

尉孟星 副教授

主讲人简介: 尉孟星，现为南开大学经济学院副教授，研究领域为行为和实验经济学。论文发表于Journal of Development Economics, Games and Economic Behavior, Journal of Economic Behavior and Organization等期刊，获得国家自然科学青年基金等。

讲座摘要：In the digital era, fragmented information disseminated by social media and algorithmic recommendations increasingly shapes public opinion, raising significant concerns about filter bubbles and polarization. This paper investigates the impacts of algorithmically induced information biases on belief updating as well as learning efficiency and polarization, compounded by intrinsic cognitive biases. Using a controlled laboratory experiment in which participants sequentially update their beliefs based on signals drawn from potentially biased sources, we document a persistent pattern of surprise-driven learning: contrary to the well-established confirmation bias, participants systematically overreact to signals that challenge their prior beliefs. When information originates from biased sources, both polarization and learning inefficiency increase. However, mere awareness of source bias is insufficient to mitigate these adverse effects. While awareness dampens the tendency to overreact to disconfirming information, it does not improve learning efficiency and even exacerbates polarization. 

讲座时间：2026年4月9日 下午2:30

讲座地点：经济学院八楼大会议室

主办单位：南开经济研究所