TY - JOUR AU - Ferson,Wayne E. AU - Sarkissian,Sergei AU - Simin,Timothy TI - Spurious Regressions in Financial Economics? JF - National Bureau of Economic Research Working Paper Series VL - No. 9143 PY - 2002 Y2 - September 2002 UR - http://www.nber.org/papers/w9143 L1 - http://www.nber.org/papers/w9143.pdf N1 - Author contact info: Wayne E. Ferson Department of Finance and Business Economics University of Southern California 3670 Trousdale Parkway Suite 308 Los Angeles, CA 90089-0804 Tel: 213/740-5615 Fax: 213/740-6650 E-Mail: ferson@marshall.usc.edu Sergei Sarkissian Faculty of Management 1001 Sherbrooke St. West McGill University Montreal, Quebec Canada H3A 1G5 E-Mail: sergei.sarkissian@mcgill.ca Timothy Simin Department of Finance Pennsylvania State University University Park, PA 16802 E-Mail: tsimin@psu.edu AB - Even though stock returns are not highly autocorrelated, there is a spurious regression bias in predictive regressions for stock returns related to the classic studies of Yule (1926) and Granger and Newbold (1974). Data mining for predictor variables interacts with spurious regression bias. The two effects reinforce each other, because more highly persistent series are more likely to be found significant in the search for predictor variables. Our simulations suggest that many of the regressions in the literature, based on individual predictor variables, may be spurious ER -