Good Question! The Effect of Positive Feedback on Contributions to Online Public Goods

Fuente: arXiv
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Autores principales: Wachs, Johannes, Röseler, Leonore, Gesche, Tobias, Ash, Elliott, Hannák, Anikó
Formato: Preprint
Publicado: 2026
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author Wachs, Johannes
Röseler, Leonore
Gesche, Tobias
Ash, Elliott
Hannák, Anikó
author_facet Wachs, Johannes
Röseler, Leonore
Gesche, Tobias
Ash, Elliott
Hannák, Anikó
contents Online platforms where volunteers answer each other's questions are important sources of knowledge, yet participation is declining. We ran a pre-registered experiment on Stack Overflow, one of the largest Q&A communities for software development (N = 22,856), randomly assigning newly posted questions to receive an anonymous upvote. Within four weeks, treated users were 6.3% more likely to ask another question and 12.9% more likely to answer someone else's question. A second upvote produced no additional effect. The effect on answering was larger, more persistent, and still significant at twelve weeks. Next, we examine how much of these effects are due to algorithmic amplification, since upvotes also raise a question's rank and visibility. Algorithmic amplification is not important for the effect on asking additional questions, but it matters a lot for the effect on answering other questions. The increase in visibility increases the probability that another user provides an answer, and that experience appears to shift the poster toward broader community participation.
format Preprint
id arxiv_https___arxiv_org_abs_2604_10360
institution arXiv
publishDate 2026
record_format arxiv
spellingShingle Good Question! The Effect of Positive Feedback on Contributions to Online Public Goods
Wachs, Johannes
Röseler, Leonore
Gesche, Tobias
Ash, Elliott
Hannák, Anikó
Social and Information Networks
Human-Computer Interaction
General Economics
Economics
Online platforms where volunteers answer each other's questions are important sources of knowledge, yet participation is declining. We ran a pre-registered experiment on Stack Overflow, one of the largest Q&A communities for software development (N = 22,856), randomly assigning newly posted questions to receive an anonymous upvote. Within four weeks, treated users were 6.3% more likely to ask another question and 12.9% more likely to answer someone else's question. A second upvote produced no additional effect. The effect on answering was larger, more persistent, and still significant at twelve weeks. Next, we examine how much of these effects are due to algorithmic amplification, since upvotes also raise a question's rank and visibility. Algorithmic amplification is not important for the effect on asking additional questions, but it matters a lot for the effect on answering other questions. The increase in visibility increases the probability that another user provides an answer, and that experience appears to shift the poster toward broader community participation.
title Good Question! The Effect of Positive Feedback on Contributions to Online Public Goods
topic Social and Information Networks
Human-Computer Interaction
General Economics
Economics
url https://arxiv.org/abs/2604.10360