William Kerr is an Associate Professor at Harvard Business School. His research and teaching focuses on entrepreneurship and innovation. One research strand examines the role of immigrant scientists and entrepreneurs in US technology development, as well as the subsequent diffusion of new innovations to the immigrants’ home countries. A second research strand considers agglomeration and entrepreneurship, with special interest in how government policies aid or hinder the entry of new firms. His final research interest is entrepreneurial finance and angel investments. He received his PhD from MIT in 2005.