Economic theory typically assumes that people are only interested in their own material wealth. Experimentalists have recently discovered that this assumption is not true under all circumstances. Especially in regular face to face interactions, not only the personal well-being but also the...

This paper addresses the question, what metrics should be used for performance evaluation and in particular how they should be weighted and combined in the presence of technological interdependencies when the agents exhibit variedly strong developed rivalry. We find that the principal reacts to...