Speaker Profile
Dr. MA Yuanhong is an Associate Professor and Ph.D. Supervisor at the School of Economics and Management, Harbin Institute of Technology. His research areas include generative AI, digital platform operations management, multimodal large models, social computing, and public governance. He has published over 20 academic papers in major domestic and international journals and conferences.
He has participated as a key researcher in scientific projects funded by the National Natural Science Foundation of China (NSFC) and the French National Research Agency (ANR), as well as in multiple university-industry and university-government collaboration projects. His research has received several academic awards, including a Best Paper Award at an international conference, an Award for Outstanding Academic Innovation, an Outstanding Thesis Award, and a Journal's Top 10 Papers of the Year award.
Abstract
This study investigates the impact of bans on Generative AI Content (AIGC) on knowledge sharing in online Q&A communities. Since the launch of ChatGPT, several communities on the Stack Exchange network have successively implemented AIGC bans. By collecting data from the platform, this study conducts an empirical analysis using a difference-in-differences (DiD) methodology.
The results show that the AIGC ban increased users' demand for knowledge but decreased the overall efficiency of answers. Further analysis reveals that this effect is particularly pronounced in non-STEM communities. The underlying mechanism is revealed by comparing the differences between human-created and AI-generated content in terms of informational effectiveness and social interactivity. The study also discusses the implications of these findings for community governance and platform policy-making.
Date/Time: November 7, 2025, 10:00 a.m.
Venue: Room 0411, 0 Teaching Building, Jiuliu Campus
