He is the author of Wired Shut: Copyright and the Shape of Digital Culture (MIT Press, 2007). His research areas include information policy (particularly freedom of expression and copyright); the relationship between the digital industry and public discourse; and the turn to technical mechanisms of social control. His current research on the “politics of platforms” examines how content sharing platforms, mobile app providers, and social networking sites set and enforce norms and policies for appropriate content, through both community governance and algorithmic curation, that shape the contours of online public discourse. He co-curates the blog Culture Digitally.