In Chapter 19 of 21 in his 2011 Capture Your Flag interview with host Erik Michielsen, business school professor Ben Hallen answers "How Can One Make His or Her Business Network More Useful?" Hallen begins by identifying critical needs and also by making sure the network extends into existing and future challenges. He differentiates sales and advice giving networks and puts a heavy emphasis on diversifying network contacts. Hallen is an Assistant Professor of Strategy and Entrepreneurship at London Business School. Previously, he was Assistant Professor of Management and Organization at University of Maryland. Hallen earned his PhD from Stanford University and its Stanford Technology Venture Program (STVP). He has been a startup CTO and graduated from the University of Virginia with a BS in Electrical Engineering and a Masters in Computer Science.