Protection for Sale Gene M. Grossman; Elhanan Helpman The American Economic Review, Vol. 84, No. 4. (Sep., 1994), pp. 833-850. Stable URL: http://links.jstor.org/sici?sici=0002-8282%28199409%2984%3A4%3C833%3APFS%3E2.0.CO%3B2-Y The American Economic Review is currently published by American Economic Association. 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.html. JSTOR's Terms and Conditions of Use provides, in part, that unless you 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://www.jstor.org/journals/aea.html. Each copy of any part of a JSTOR 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 and preserving a digital archive of scholarly journals. For more information regarding JSTOR, please contact support@jstor.org. http://www.jstor.org Sat Mar 3 14:09:35 2007