Abstract
This study reports on the activities from a large question and answer (Q&A) site, Stack Exchange, which brings together individual communities of users on every specific topic. Q&A communities are selected from the top 30 sites from Stack Exchange, ranked by registered users as well as the percentage of answered questions. Using online survey, this study empirically tests a model of knowledge-sharing contribution to examine why individuals share knowledge in Stack Exchange. Research model is developed based on the theory of reasoned action, using attitude as the proxy to study the influence of possible motivations on knowledge-sharing intention. Nine factors were examined including knowledge-sharing self-efficacy, altruism, trust, reciprocity, personal expected returns, identification, shared vision, social network ties, and community-level expected returns. Results show that knowledge sharing is motivated primarily through altruism and personal expected returns.
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