A THEORY OF COOPERATION IN GAMES WITH AN APPLICATION TO MARKET SOCIALISM By John E. Roemer March 2018 COWLES FOUNDATION DISCUSSION PAPER NO. 2125 COWLES FOUNDATION FOR RESEARCH IN ECONOMICS YALE UNIVERSITY Box 208281 New Haven, Connecticut 06520-8281 http://cowles.yale.edu/ March 16, 2018 “A theory of cooperation in games with an application to market socialism” by John E. Roemer** Yale University
[email protected] ** I am grateful to Roberto Veneziani for organizing the symposium that led to this issue, and to the authors of the contributions herein for stimulating my thinking on Kantian cooperation. 1 1. Man, the cooperative great ape It has become commonplace to observe that, among the five species of great ape, homo sapiens is by far the most cooperative. Fascinating experiments with infant humans and chimpanzees, conducted by Michael Tomasello and others, give credence to the claim that a cooperative protocol is wired into to the human brain, and not to the chimpanzee brain. Tomasello’s work, summarized in two recent books with similar titles (2014, 2016), grounds the explanation of humans’ ability to cooperate with each other in their capacity to engage in joint intentionality, which is based upon a common knowledge of purpose, and trust. There are fascinating evolutionary indications of early cooperative behavior among humans. I mention two: pointing and miming, and the sclera of the eye. Pointing and miming are pre-linguistic forms of communicating, probably having evolved due to their usefulness in cooperative pursuit of prey. If you and I were only competitors, I would have no interest in indicating the appearance of an animal that we, together, could catch and share.