In-group favoritism in social dilemma situations is one of Social Identity Theory's main findings. We investigate what causes the in-group bias: is it merely due to group affiliation or, alternatively, is guilt-aversion moderating the strength of in-group favoring? We induce group membership in...

A central understanding in experimental economics is that subjects’ decisions in the lab are independent of history. We test whether this assumption of between-experiment independence is indeed justified. We analyze experiments with an allocation decision (like a dictator or ultimatum game)...

We analyse pricing, effort and tipping decisions at the online service ‘Google Answers’. Users set a price for the answer to their question ex ante, and they can additionally tip the researcher who provided the answer ex post.

We conduct a real-effort task experiment where subjects’ performance translates into a donation to a charity. In a within-subjects design we vary the visibility of the donation (no/private/public feedback). Confirming previous studies, we find that subjects’ performance increases, that is,...

Actual behaviour is influenced in important ways by moral emotions, for instance guilt or shame. The framework of dynamic psychological games allows the economic modelling of such emotions. Our experimental study uses psychological scales to measure individuals’ dispositions to experience...

We analyze the effect of investments in corporate social responsibility (CSR) on workers’ motivation. In our experiment, a gift exchange game variant, CSR is captured by donating a certain share of a firm’s profit to charity. We are testing for CSR effects by varying the possible share of...

The paper analyses the payment behaviour of customers of the online music label Magnatune. Customers may pay what they want for albums, as long as the payment is within a given price range ($5-$18). Magnatune's comprehensive pre-purchase access facilitates music discovery and allows an informed...

In a recently published article, Bruni and Stanca (2008) suggest that television viewing has a negative impact on life satisfaction. In this note we argue that the empirical approach they use (an approach that omits the main effect of TV viewing in life satisfaction) is problematic. We estimate...