Too Long, Didn’t Read? The Impact of Length Limits on Microblogging Engagement

Shuting Wang () and Brad N. Greenwood ()
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Shuting Wang: Zicklin School of Business, Baruch College City University of New York, New York, New York 10010
Brad N. Greenwood: School of Business, George Mason University, Fairfax, Virginia 22030

Management Science, 2025, vol. 71, issue 11, 9437-9461

Abstract: Social media platforms aggressively compete for the participants who create content on their sites. In this study, we delve into one tactic of this competition that has become increasingly popular but received limited scholarly attention—the extension of length limits (i.e., the maximum number of characters in a post)—and how it affects both the production and consumption of social media posts. We investigate these questions by exploiting a natural experiment, the phased rollout of length limit extensions on a leading Chinese microblog platform. Findings suggest that extending length limits significantly increased the number of daily posts of individual users. However, and strikingly, only already active users appear to post more after the extension with little observed change from less active users. Further, results show that extending length limits increases the number of likes each post receives, indicating that extensions improve content quality and may increase engagement in the long term. This suggests that, by permitting longer posts, social media platforms can facilitate engagement from both the post generators and audiences (at least in terms of likes). However, findings also suggest that extending length limits risks further concentrating content generation from the vocal minority, thereby making the silent majority less visible on the platforms.

Keywords: length limit; user engagement; post activity; silent majority and vocal minority; microblogging platforms; social media (search for similar items in EconPapers)
Date: 2025
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