Many people enabled the underlying research embodied in this book to be accomplished and the book itself to be written. Most significant at the outset was my close research colleague of many years Herbert Wainer. Herb was my first graduate research assistant on the project and then stayed with me as a research associate for several critical years while much data gathering and analysis was undertaken and many of the needed additional phases of research conceived. Nearly forty other graduate students contributed importantly to the multi-phase research program, all identified in the book's Appendix in regard to their individual areas of effort. During the early years I benefited from the encouragement and research insights of the late Donald Marquis, founder of the MIT Program on the Management of Research and Development, who inspired a focus on ambitious technology-related studies and careful measurement of results. And Jay Forrester, who attracted me from Electrical Engineering to a career in the MIT Sloan School of Management, constantly inspired entrepreneurial thoughts and acts by his own pioneering examples and insights.
As the research work emerged into written form I gained enormously from thoughtful comments from many colleagues. Of special note, F. Michael Scherer, Ian MacMillan and Andrew Van de Ven produced detailed assessments of all aspects of the book which I deeply appreciate. Ralph Katz, Marc Meyer and Steven Ruma also provided significant help. Karl Vesper, Jeffry Timmons, Rosabeth Moss Kantor and David Morgenthaler gave important encouragement and commentary on the work. Of course, my editor Herbert J. Addison supplied insightful guidance and the persuasiveness for me to make substantial changes, as well as unfailing support throughout the publication process.
My wife Nancy tried for years to get me to turn those piles of notes and drafts into a book, perhaps just to clean up the mess. But then she read and marked up all parts of the manuscripts and helped assure me that the effort was credible. Nancy was also involved in at least the background of all of my personal entrepreneurial ventures so she became a second source of memory for many details and perspectives. She shares more than anyone else in the overall credits.