PT - JOURNAL ARTICLE ED - , TI - Index AID - 10.3368/jhr.49.4.1121 DP - 2014 Oct 02 TA - Journal of Human Resources PG - 1121--1126 VI - 49 IP - 4 4099 - http://jhr.uwpress.org/content/49/4/1121.short 4100 - http://jhr.uwpress.org/content/49/4/1121.full SO - J Hum Resour2014 Oct 02; 49