Much of his research focuses on the structure and role of venture capital and private equity organizations. (This research is collected in three books, The Venture Capital Cycle, The Money of Invention, and Boulevard of Broken Dreams.) He also examines policies towards innovation, and how they impact firm strategies. (The research is discussed in the books Innovation and Its Discontents, The Comingled Code, and the forthcoming Architecture of Innovation.) He co-directs the National Bureau of Economic Research’s Productivity, Research, and Innovation Program and serves as co-editor of their publication, Innovation Policy and the Economy. He founded and runs the Private Capital Research Institute, a non-profit devoted to encouraging data access to and research about venture capital and private equity.
In the 1993-94 academic year, he introduced an elective course for second-year MBAs on private equity finance. In recent years, “Venture Capital and Private Equity” has consistently been one of the largest elective courses at Harvard Business School.