Digital textbooks, which are equipped with various learning resources including multimedia aids, assessment questions, and hyperlinks to external resources, can be an important channel for harnessing technologies in classrooms. Korea's digital textbook experiment provides a unique empirical...

Quantifying the consumer welfare of smartphones is important in understanding the new innovation's overall benefit to the economy. I empirically estimate consumer surplus from smartphones and explore the market and policy implications of the welfare estimates. I employ newly available Korean...

I examine whether bundling of telecommunications services makes individuals less likely to switch their service provider because of increased switching costs. Using a detailed survey dataset from the Korea Information Society Development Institute (KISDI), I find that Internet subscribers who...

We examine whether user-generated physician ratings from online sources signal physician quality information and affect patients' physician choices. We collect physician rating and review data from Yelp, a leading online physician rating platform, and match the rating data with Medicare claims...

Fueled by social media, health misinformation is spreading rapidly across online platforms. Myths, rumors, and false information on COVID-19 and vaccines are flourishing, and the aftermath can be disastrous. A more concerning trend is that people are increasingly relying on social media to...

Social media video sponsorship, in which a sponsor forms a partnership with a content creator and sponsors video content, has become increasingly popular. Although the extant theoretical literature supports the importance of the congruency between the sponsor and sponsee in forming...

With the prevalence of smartphones, it is important to understand the relationship between the smartphone channel and the computer channel. In this paper, we examine the extent to which smartphones substitute for or complement computers. We utilize unique panel data on individuals’ smartphone...