Our study examines the impact of both a demand side factor (online user reviews) and a
supply side factor (product variety) on the long tail and superstar phenomena in the context
of online software downloading. The descriptive analysis suggests a significant superstar
download pattern and also the emergence of the long tail. Using the quantile regression
technique, we find the significant interaction effect between online user reviews and product
variety on software download. We find that the impacts of both positive and negative user …