Video games have become a major contributor to the US and global economy. This paper studies network externalities in the online video game industry. Even though network externalities are recognized as a major driver of new product diffusion, testing the existence and the impact of network...

In this paper, we examine the persuasive influences of online user comments (or word-of-mouth) and of the reviews by movie critics on moviegoers’ evaluation of to-be-released movies. Two distinctive features of this study are: (1) moviegoers are considered to be heterogeneous in their movie...

This paper investigates the responses of firms and governments to social media activities. The unexpected release and short­lived circulation of the environmental documentary Under the Dome in China in 2015 offers a natural experiment. We combine a comprehensive firm-­level pollutant emissions...