Live streaming has enabled viewers to interact with broadcasters and peer viewers, and tip the broadcaster based on their emotional state. While most tips are small, a minority of viewers tip extremely large. To uncover the tipping pattern, we draw on the emotion literature and the competitive...

With the rising of social media, firms seek to contract with key opinion leaders (KOLs) who have strong influence on their social media followers, to promote products of the firms by making videos. This paper studies the problem of how to select KOLs and schedule their advertising campaigns in...