TY - JOUR AU - Cunha,Flavio AU - Heckman,James J. AU - Navarro,Salvador TI - Separating Uncertainty from Heterogeneity in Life Cycle Earnings JF - National Bureau of Economic Research Working Paper Series VL - No. 11024 PY - 2005 Y2 - January 2005 UR - http://www.nber.org/papers/w11024 L1 - http://www.nber.org/papers/w11024.pdf N1 - Author contact info: Flavio Cunha Department of Economics University of Pennsylvania 160 McNeil Building 3718 Locust Walk Philadelphia, PA 19104-6297 Tel: 215/898-5652 E-Mail: fcunha@sas.upenn.edu James J. Heckman Department of Economics The University of Chicago 1126 E. 59th Street Chicago, IL 60637 Tel: 773/702-0634 Fax: 773/702-8490 E-Mail: jjh@uchicago.edu Salvador Navarro Department of Economics Social Science Centre, Room 4071 London, Ontario, Canada, N6A 5C2 Tel: 519 661-3500 Fax: 519 661-3666 E-Mail: snavarr@uwo.ca AB - This paper develops and applies a method for decomposing cross section variability of earnings into components that are forecastable at the time students decide to go to college (heterogeneity) and components that are unforecastable. About 60% of variability in returns to schooling is forecastable. This has important implications for using measured variability to price risk and predict college attendance. ER -