Risk, Return, and Equilibrium: Empirical Tests TOR Eugene F Fama. James D. Mac Beth The Journal of political Economy, Volume 81, Issue 3(May -Jun, 1973),607-636 Stable url: http://links.jstor.org/sici?sici=0022-3808%28197305%2f197306%2981%03a3%03c607%3arraeett3e2.0.c0%03b2-c 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 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 The Journal of political Economy is published by The University of Chicago Press. Please contact the publisher for further permissions regarding the use of this work. Publisher contact information may be obtained at http://www.jstor.org/journals/ucpress.html The Journal of Political economy o1973 The University of Chicago Press jStOR and the jStOR logo are trademarks of JSTOR, and are Registered in the U.S. Patent and Trademark Office For more information on STOR contact jstor- info @umich. edu @2002 JSTOR http://www」]stor.org Wed nov1321:33:052002