The paper analyses on an experimental basis the phenomenon of non-optimal under-diversification in portfolio choice decisions and investigates the reasons behind it. The most important obstacles for optimal diversification are studied the correlation neglect hypothesis and the overconfidence...

Although algorithms make more accurate forecasts than humans in many applications, decision-makers often refuse to resort to their use. In an economic experiment, we examine whether the extent of this phenomenon known as algorithm aversion can be reduced by granting decision-makers the...

The paper aims at defining the role of intentions for reciprocity. The ultimatum game is modified, by adding a kind of randomizer (Chinese Whisperʺ), to generate outcomes which are not intended und thus to separate the proposers’ initial intentions from their actual offers. The mechanism...