Partner choice creates competitive altruism in humans

Reciprocal altruism has been the backbone of research on the evolution of altruistic behaviour towards non-kin, but recent research has begun to apply costly signalling theory to this problem. In addition to signalling resources or abilities, public generosity could function as a costly signal of cooperative intent, benefiting altruists in terms of (i) better access to cooperative relationships and (ii) greater cooperation within those relationships. When future interaction partners can choose with whom they wish to interact, this could lead to competition to be more generous than others. Little empirical work has tested for the possible existence of this ‘competitive altruism’. Using a cooperative monetary game with and without opportunities for partner choice and signalling cooperative intent, we show here that people actively compete to be more generous than others when they can benefit from being chosen for cooperative partnerships, and the most generous people are correspondingly chosen more often as cooperative partners. We also found evidence for increased scepticism of altruistic signals when the potential reputational benefits for dishonest signalling were high. Thus, this work supports the hypothesis that public generosity can be a signal of cooperative intent, which people sometimes ‘fake’ when conditions permit it

The Problem of Free Riding in Voluntary Generic Advertising: Parallelism and Possible Solutions from the Lab

Producers of many commodities pay for generic advertising, which is a public good for producers and, in cases like healthy foods, enhances social welfare. Though most programs were initially funded through the Voluntary Contribution Mechanism, many became mandatory to mitigate free riding. This experimental research simulates key economic and psychological details of these programs and produces donation results strikingly similar to a historic example. Because mandatory programs may be declared unconstitutional, the Provision Point Mechanism is tested as an alternative. This research also shows that refund-by-request donation mechanisms establish a status quo of contributing and reduce free riding. Copyright 2008, Oxford University Press.