1. German Works Councils and the Anatomy of Wages;John Addison;Industrial and Labor Relations Review,2010
2. Labor Contracts as Partial Gift Exchange;George Akerlof;Quarterly Journal of Economics,1982
3. Gift Exchange and Efficiency Wage Theory: Four Views;George Akerlof;American Economic Review Proceedings,1984
4. Production, Information Costs and Economic Organization;Armen Alchian;American Economic Review,1972
5. Artz, Benjamin and John S. Heywood. "Performance Pay and Workplace Injury: US Survey Evidence." Department of Economics, University of Wisconsin, 2013. Available at www.birmingham.ac.uk/Documents/college-social-sciences/business/events/beyond-wages/stansiebert/