См. David Autor, “The Polarization of Job Opportunities in the U. S. Labor Market”, Brookings Institution (апрель 2010 г.), http://www.brookings.edu/research/papers/2010/04/jobs-autor (по состоянию на 10 августа 2013 г.); and Daron Acemoglu and David Autor, “Skills, Tasks and Technologies: Implications for Employment and Earnings”, Working Paper (National Bureau of Economic Research, июнь 2010 г.), http://www.nber.org/papers/w16082.