Primary Outcomes (explanation)
Cooperation rates are measured directly from the choices of experimental subjects. We will use both individual cooperation rates and mutual cooperation rates. The former are more useful for considering individual strategies while the latter are better suited for studying transitions within a supergame. The two measures are highly correlated, so it is largely a matter of convenience which is used.
We also plan to fit a structural model to the data to estimate the distribution of strategies. We will fit SFEM using software developed by Dal Bo and Frechette (forthcoming), and also plan to modify SFEM to allow for sophisticated Bayesian learners.