I am a professor at the School of Information at UC Berkeley. Previously I was a professor at Harvard Business School where I taught in the MBA program. I have also been a professor of entrepreneurship at INSEAD, a leading business school in Europe, where I led the executive education program for SAP (the software company) and where I taught in the MBA and executive education programs. My research has been on knowledge sharing, networks and collaboration in companies. I have also spent a number of years working as a consultant and senior manager in the London, Stockholm and San Francisco offices of the Boston Consulting Group (BCG). I received my PhD in business administration from Stanford.