His overall research program focuses on how technology-based firms combine open and proprietary strategies to create and capture value, with a particular interest in innovation networks such as innovation communities and ecosystems. He has studied a variety of technology-oriented topics, including renewable energy, technology entrepreneurship, intellectual property, open source software, and IT standards competition. He regularly comments on the business of technology in his weblogs, including Engineering Entrepreneurship (about technology-based startups) and the Open Innovation Blog.