Exercise-tracking apps are novel tools for delivering personalized behavioral interventions. Despite the growing usage of exercise applications, the efficacy of in-exercise app features in driving usage and athletic outcomes remains to be poorly understood. Drawing on the literature on...

Darknet markets have been increasingly used for the transaction of illegal products and services in the last decade. In particular, it is estimated that drugs make up two-thirds of darknet market transactions. The growth of illicit transactions on darknet markets have led enforcement agencies to...

The Internet facilitates information flow between sex workers and buyers, making it easier to set up paid sexual transactions online. Despite the illegality of selling sexual services online, Section 230 of Communications Decency Act shields websites from liability for unlawful postings by third...