Canon, Maria Eugenia and Marifian, Elise A. "Job Polarization Leaves Middle-Skilled Workers Out in the Cold," in Federal Reserve Bank of St. Louis. "January 2013, Vol. 21, No. 1," Regional Economist : A Quarterly Review of Business and Economic Conditions (January 2013) : 9-11. https://fraser.stlouisfed.org/title/6275/item/601852/toc/584763 , accessed on March 29, 2024.