Why Do Firms Differ, and How Does it Matter? TORIo Richard R. Nelson Strategic Management Journal, Vol 12, Special Issue: Fundamental Research Issues in Strategy and Economics (Winter, 1991), 61-74 Stable url: http://links.jstor.org/sici?sici=0143-2095%028199124%02912%3c61%03awdfdah%o3e2.0.c0%03b2-i trategic Management Journal is currently published by John Wiley Sons Your use of the jStOR archive indicates your acceptance of JSTOR,'s Terms and Conditions of Use, available at http://www.jstor.org/about/terms.htmlJstOr'sTermsandConditionsofUseprovidesinpartthatunlessyou have obtained prior permission, you may not download an entire issue of a journal or multiple copies of articles, and you may use content in the JSTOR archive only for your personal, non-commercial use. Please contact the publisher regarding any further use of this work. Publisher contact information may be obtained at http://wwwjstor.org/journals/jwiley.html Each copy of any part of a STOR transmission must contain the same copyright notice that appears on the screen or printed page of such transmission jStOR is an independent not-for-profit organization dedicated to creating and preserving a digital archive of scholarly journals. For more information regarding JSTOR, please contact support @ jstor. org http://www」]stor.org Wed nov211:34:43200