On page 7 (page 50 in the published paper) we wrote "Our main classification follows that of Spitz-Oener (2006), who, in her study of the changing task content of German occupations, groups survey questionnaire responses into five categories: nonroutine analytic, nonroutine interactive, nonroutine manual, routine cognitive, and routine analytic." The final two words in this sentence should instead be "routine manual."