Supplement to : 'Foundations for Cooperation in the Prisoners’ Dilemma'

We establish that in the Prisoners' Dilemma, the model of Daley and Sadowski (2014) is logically distinct from three models that employ well-known forms of other regarding preferences: altruism (Ledyard, 1995; Levine, 1998), inequity aversion (Fehr and Schmidt, 1999), and reciprocity (Rabin, 1993).The paper "Foundations for Cooperation in the Prisoners' Dilemma" to which this Supplement applies is available at the following URL: "http://ssrn.com/abstract=2331579" http://ssrn.com/abstract=2331579