Anonymity and Cooperation
Guyer data frame has 20 rows and 3 columns.
The data are from an experiment in which four-person groups
played a prisoner's dilemma game for 30 trails, each person
making either a cooperative or competitive choice on each
trial. Choices were made either anonymously or in public;
groups were composed either of females or of males.
The observations are 20 groups.
Fox, J. and Guyer, M. (1978) Public choice and cooperation in n-person prisoner's dilemma. Journal of Conflict Resolution 22, 469--481.
Fox, J. (1997) Applied Regression, Linear Models, and Related Methods. Sage.