Снижение качества преподавательской работы: см. статьи Marigee Р. Bacolod, "Do Alternative Opportunities Matter? The Role of Female Labor Markets in the Decline of Teacher Supply and Teacher Quality, 1940-1990", Review of Economics and Statistics 89, no. 4 (ноябрь 2007 г.); Harold О. Levy, "Why the Best Don't Teach", The New York Times, September 9, 2000; and John H. Bishop, "Is the Test Score Decline Responsible for the Productivity Growth Decline", American Economic Review 79, no. 1 (март 1989 г.).
