Reciprocity in Gift-Exchange-Games
  This paper presents an analysis of data from a gift-exchange-game experiment.
The experiment was described in `The Impact of Social Comparisons on
Reciprocity' by G\"achter et al. 2012. Since this paper uses state-of-art data
science techniques, the results provide a different point of view on the
problem. As already shown in relevant literature from experimental economics,
human decisions deviate from rational payoff maximization. The average gift
rate was $31$%. Gift rate was under no conditions zero. Further, we derive some
special findings and calculate their significance.
