We analyse pricing, effort and tipping decisions in the online service "Google Answers". While users set a price for the answer to their question ex ante, they can additionally give a tip to the researcher ex post. In line with the related experimental literature we find evidence that tipping is...

In-group favoritism in social dilemma situations is one of the main findings of studies in Social Identity Theory. We investigate what causes the in-group bias: is it due to mere group affiliation or, alternatively, is guilt-aversion a possible explanation? We induce group membership in a...

We analyse pricing, effort and tipping decisions in the online service Google Answers. While users set a price for the answer to their question ex ante, they can additionally give a tip to the researcher ex post. In line with the related experimental literature we find evidence that tipping is...

Actual behaviour is influenced in important ways by moral emotions, for instance guilt or shame (see among others Tangney et al., 2007). Belief-dependant models of social preferences using the framework of psychological games aim to consider such emotions to explain other-regarding behaviour....

We investigate to what extent genuine social preferences can explain observed other-regarding behavior. In a dictator game variant subjects can choose whether to learn about the consequences of their choice for the receiver. We find that a majority of subjects showing other-regarding behavior...

Intentions-based models of social preferences use the framework of psychological games and incorporate higher order beliefs and actions into the utility function. We test the robustness of two types of intentions-based models (guilt aversion and reciprocity). In addition to incentivised...

Recent research has cast some doubt on the general validity of outcome-based models of social preferences. We develop a model based on cognitive dissonance that focuses on the importance of self-image. An experiment (a dictator game variant) tests the model. First, we find that subjects whose...

Intentions-based models of social preferences use the framework of psychological games and incorporate higher order beliefs and actions into the utility function. We test the robustness of two types of intentions-based models (guilt aversion and reciprocity). In addition to incentivised...