Abstract

The partner choice approach to understanding the evolution of cooperation builds on approaches that focus on partner control by considering processes that occur prior to pair or group formation. Proponents of the partner choice approach rightly note that competition to be chosen as a partner can help solve the puzzle of cooperation. I aim to build on the partner choice approach by considering the role of signalling in partner choice. Partnership formation often requires reliable information. Signalling is thus important in the context of partner choice. However, the issue of signal reliability has been understudied in the partner choice literature. The issue deserves attention because – despite what proponents of the partner choice approach sometimes claim – that approach does face a cheater problem, which we might call the problem of false advertising in biological markets. Both theoretical and empirical work is needed to address this problem. I will draw on signalling theory to provide a theoretical framework within which to organise the scattered discussions of the false advertising problem extant in the partner choice literature. I will end by discussing some empirical work on cooperation, partner choice, and punishment among humans.