TY - JOUR AU - Autor,David H. AU - Handel,Michael J. TI - Putting Tasks to the Test: Human Capital, Job Tasks and Wages JF - National Bureau of Economic Research Working Paper Series VL - No. 15116 PY - 2009 Y2 - June 2009 UR - http://www.nber.org/papers/w15116 L1 - http://www.nber.org/papers/w15116.pdf N1 - Author contact info: David Autor Department of Economics MIT, E52-371 50 Memorial Drive Cambridge, MA 02142-1347 Tel: 617/258-7698 Fax: 617/253-1330 E-Mail: dautor@mit.edu Michael J. Handel Department of Sociology 539 Holmes Hall Northeastern University Boston, MA 02115 Tel: 617-373-3620 E-Mail: m.handel@neu.edu AB - Employing original, representative survey data, we document that cognitive, interpersonal and physical job task demands can be measured with high validity using standard interview techniques. Job tasks vary substantially within and between occupations, are significantly related to workers' characteristics, and are robustly predictive of wage differentials both between occupations and among workers in the same occupation. We offer a conceptual framework that makes explicit the causal links between human capital endowments, occupational assignment, job tasks, and wages. This framework motivates a Roy (1951) model of the allocation of workers to occupations. Tests of the model’s implication that 'returns to tasks' must negatively covary among occupations are strongly supported. ER -