1. Labor contracts as partial gift exchange;Akerlof;Quarterly Journal of Economics,1982
2. Berliner, J.S., 1957. Factory and Manager in Soviet Union. Harvard University Press, Cambridge
3. Cooper, David J., Garvin, Susan, Kagel, John H., 1994. Adaptive Learning Vs. Equilibrium Refinements in An Entry Limit Pricing Game. Mimeograph, University of Pittsburgh
4. Fehr, Ernst, Gachter, Simon, Kirchsteiger, Georg, 1996a. Reciprocity As A Contract Enforcement Device – Experimental Evidence. Mimeograph, University of Zurich
5. Fehr, Ernst, Gachter, Simon, 1996b. How Effective Are Trust and Reciprocity Based Incentives? Mimeograph, University of Zurich