Social-Self-Interest

This paper is about rational sociality. Retaining rational choice as its basic framework, it aims to enrich it by taking seriously a well-established cultural, social and psychological phenomenon: that some inter-personal relationships have intrinsic value. These are termed primary. Utility maximisation includes the binary choice to enter or not to enter a primary relationship: this on the one hand has a direct impact on utility, and on the other imposes restrictions on consumption choices. The model encompasses standard economic choice theory as a special case, while explicitly recognising that self-interested agents make choices that are sometimes group dependent. The broad scope of this approach is illustrated by a number of extensions and applications, some of which lead to distinctly unorthodox conclusions