2023 Volume 50 Issue 2 Pages 81-95
For Q&A site, increasing the number of times users post, in otherwords, encouraging them to repost questions is important to strengthenthe loyalty to the site. To encourage users on the Q&A site to repostquestions, it is necessary for its management company to giveefficiently points to users, which the company offers them as incentiveto post. This study aimed to analyze what kind of answers makes iteasier for the questioner to post the next question in a short period.The data to be analyzed is the questions and answers data of Q&Awebsite. Considering the response to the question as an intervention,propensity score matching is used for this analysis to balance thecovariates between intervention group and non-intervention group. Also,we propose to balance the unobserved heterogeneity of the questioners byincorporating different random intercepts for each questioner into themodel of the propensity score calculation. The result of this study canbe used to propose Q&A site management companies the way of givingpoints effectively to promote questions.