Auflistung nach Autor:in "Kranz, Tobias T."
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- ZeitschriftenartikelBeware of Performance Indicators(Business & Information Systems Engineering: Vol. 57, No. 6, 2015) Kranz, Tobias T.; Teschner, Florian; Weinhardt, ChristofOnline trading interfaces are important instruments for retail investors. For sound reasons, regulators obligate online brokers to inform customers about certain trade related risks. Research has shown that different behavioral biases can decrease traders’ performance and hence lead to pecuniary losses. The disposition to hold losing stocks too long and sell winning stocks too early (‘disposition effect’) is such a deviation from rational behavior. The disposition effect is analyzed for the prediction market ‘Kurspiloten’ which predicts selected stock prices and counts nearly 2000 active traders and more than 200,000 orders. We show that the disposition effect can be aggravated by visual feedback on a trader’s performance via colored trend direction arrows and percentages. However, we find no evidence that such an interface modification leads to higher activity. Furthermore, we can not confirm that creating awareness of the disposition effect with textual information is suited to decreasing its strength.
- KonferenzbeitragDecision behavior and performance in mobile trading applications(MMS 2012: Mobile und Ubiquitäre Informationssysteme, 2012) Teschner, Florian; Kranz, Tobias T.; Weinhardt, ChristofA common belief about decision making is that the more information we process the better our decisions. Increasingly, we rely on (mobile) information systems to filter, aggregate and present information in order to make it easier to process. With the rise of mobile IS the question arises how decision behavior differs compared to stationary settings. In this paper we analyze user actions in a repeated market environment. We conduct a field experiment in which participants can choose stationary and/or mobile access. Exhaustingly recording all user actions we can compare user performance depending on the device. We are able to distinguish between decision accuracy and behavior in a market environment and thereby provide insight into the interplay between interface, information and decision making.