(EN) David Card e Alan B. Krueger, 4 (PDF), in Minimum Wages and Employment: A Case Study of the Fast-Food Industry in New Jersey and Pennsylvania, American Economic Review, vol. 84, 1994, pp. 772–793.
(EN) Joseph Stiglitz, 1–2 (PDF), in Employment, social justice and societal well-being, International Labour Review, vol. 141, 2002, pp. 9–29 (archiviato dall'url originale il 25 luglio 2006).