Two traditional assumptions in neo-classical economics have been material self-interest and (commonly known) decision rationality. Since there is ample contradictory empirical evidence, many recent attempts have been made to remodel the situation so that rational behavior is more in line with...

Leniency clauses, offering cartelists legal immunity if they blow the whistle on each other, is a recent anti-trust innovation. The authorities wish to thwart cartels and promote competition. This effect is not evident, however; whistle-blowing may enforce trust and collusion by providing a tool...

Is truth-value of a statement what lying aversion is all about? We propose an experimental test and find only limited support. In this context with 'bare promises', we also test for guilt aversion and again find only limited support.