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Studies by the research group are often based on behavioral economic approaches. These studies thereby relax the assumption of a rationally acting and fully informed homo oeconomicus, instead taking into account that people can be subject to systematic misjudgments. In addition to traditional economic instruments such as price-based measures, the research group tests behavioral economic interventions (sometimes called "nudges"), and also investigates whether these interventions trigger negative psychological welfare effects. The aim is to conduct comprehensive welfare analyses that consider all costs and benefits.