Contributions to public goods simulated in economists' laboratoryexperiments have two peculiarities from the perspective ofstatistical modelling. There is a variety of contributor behaviours(Ledyard, 1995), suggestive perhaps of separate classes ofindividuals, and contributions are doubly...

Since homo sapiens is a social animal, one might expect human nature the set of psychological propensities with which our species is naturally endowed to equip human beings to live in social groups. In this chapter, we consider the implications of this idea for economics and game theory. We...