In a recent QJE-article, Gneezy and Potters (1997) present experimental evidence for the impact of feedback frequency on individual risk taking behavior in repeated investment decisions. They find an increased willingness to invest into a risky asset if less frequent feedback about the outcome...

This paper analyzes the relation between momentum strategies (strategies that buy stocks with high returns over the previous three to 12 months and sell stocks with low returns over the same period) and turnover (number of shares traded divided by the number of shares outstanding) for the German...

In economic models, it is usually assumed that agents aggregate their private and all available public information correctly and completely. In this experiment, we identify subjects' updating procedures and analyze the consequences for the aggregation process. Decisions can be based on private...

In an experiment we study the influence of prior outcomes on risky choice. We document a strong framing effect. By manipulating the presentation format of the decision problem we can induce increased risk taking following a gain, i.e. the house-money effect (Thaler and Johnson 1990) or,...

Decision weights are an important component in recent theories for decision making under uncertainty. To better explain these decision weights, a two stage approach has been proposed: first, the probability of an event is judged and then this probability is transformed by the probability...

Already in the 1930ies psychologists mentioned the tendency of people to see the self as the center of social judgment. This leads to egocentrically biased judgments when assessing others behavior. Since the first demonstration of this social projection bias in a study 1977 by Ross, Greene, and...

In the last years the importance of decision analysis for real world decision making tasks has been widely noticed and stressed in the corporate, public and even in the private sector. Decision analysis is considered to be a prescriptive approach to decision making which delivers applicable...

We perform a market experiment to investigate how average transaction prices react to the arrival of new information. Following a positive shock in fundamental value, prices underreact strongly; following negative shocks we find evidence of a much less pronounced underreaction. After the shock,...

There is no commonly, by investment advisors as well as theorists accepted answer to the question, whether the risky fraction of an investor's portfolio should depend on his time horizon. For this reason we try to define the decision problem in its most general way and gradually reduce it by...

We examine how the disposition effect, an empirically documented bias in investor behavior, affects market prices. We show that the disposition effect can help explain positive autocorrelation of returns, i.e. the momentum effect. Our model explains the strong seasonality in momentum profits and...