Auflistung nach Autor:in "Weinhardt, Christof"
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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.
- ZeitschriftenartikelBig Digital Platforms(Business & Information Systems Engineering: Vol. 61, No. 6, 2019) Aalst, Wil; Hinz, Oliver; Weinhardt, Christof
- ZeitschriftenartikelBISE Student(Business & Information Systems Engineering: Vol. 64, No. 6, 2022) Sunyaev, Ali; Weinhardt, Christof; Aalst, Wil; Hinz, Oliver
- ZeitschriftenartikelBlind Spots in Business and Information Systems Engineering(Business & Information Systems Engineering: Vol. 61, No. 2, 2019) Hinz, Oliver; Aalst, Wil M. P.; Weinhardt, Christof
- ZeitschriftenartikelCitizen Science in Information Systems Research(Business & Information Systems Engineering: Vol. 62, No. 4, 2020) Weinhardt, Christof; Kloker, Simon; Hinz, Oliver; Aalst, Wil M. P.
- ZeitschriftenartikelCloud-Computing(Wirtschaftsinformatik: Vol. 51, No. 5, 2009) Weinhardt, Christof; Anandasivam, Arun; Blau, Benjamin; Borissov, Nikolay; Meinl, Thomas; Michalk, Wibke; Stößer, JochenIn letzter Zeit hat ein neues Rechen- und Architekturparadigma Einzug gehalten, das sogenannte Cloud-Computing. Es wird mindestens so umfangreich beworben wie Grid-Computing wenige Jahre zuvor, was u. a. zahlreiche Diskussionen über die Abgrenzung zwischen Grid- und Cloud-Computing angeregt hat. Der erste Beitrag dieses Artikels ist deshalb die eingehende Diskussion der verschiedenen Charakteristika von jeweils Grid- und Cloud-Computing. Diese technische Abgrenzung ermöglicht eine fundierte Diskussion der Geschäftschancen des Cloud-Computing-Paradigmas. In diesem Artikel wird hierzu zunächst ein Framework für Geschäftsmodelle in Clouds aufgestellt. Anschließend werden aktuelle Cloud-Angebote besprochen und in das Framework eingereiht. Zum Schluss spricht dieser Artikel Herausforderungen und erfolgversprechende Forschungsgebiete an, die adressiert und bewältigt werden müssen, damit die Vision von Clouds erfolgreich umgesetzt werden kann.AbstractLately, a new computing paradigm has emerged: “Cloud Computing”. It seems to be promoted as heavily as the “Grid” was a few years ago, causing broad discussions on the differences between Grid and Cloud Computing. The first contribution of this paper is thus a detailed discussion about the different characteristics of Grid Computing and Cloud Computing. This technical classification allows for a well-founded discussion of the business opportunities of the Cloud Computing paradigm. To this end, this paper first presents a business model framework for Clouds. It subsequently reviews and classifies current Cloud offerings in the light of this framework. Finally, this paper discusses challenges that have to be mastered in order to make the Cloud vision come true and points to promising areas for future research.
- ZeitschriftenartikelCorporate Digital Responsibility(Business & Information Systems Engineering: Vol. 64, No. 2, 2022) Mihale-Wilson, Cristina; Hinz, Oliver; Aalst, Wil; Weinhardt, Christof
- 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.
- ZeitschriftenartikelDesign of a microgrid local energy market on a blockchain-based information system(it - Information Technology: Vol. 61, No. 2-3, 2019) Kirpes, Benedikt; Mengelkamp, Esther; Schaal, Georg; Weinhardt, ChristofIn this paper, we propose a model-based system architecture for an interoperable blockchain-based local energy market for prosumers in a residential microgrid setting. Based on the Smart Grid Architecture Model our analysis deduced 21 organizational, informational, technical and blockchain requirements for a local energy market and its underlying information system. These are evaluated in the Landau Microgrid case study. We derive, that a clear value proposition for the key stakeholders, standardization of data exchange and communication, and a suitable physical implementation are the major challenges.
- ZeitschriftenartikelDie Aufgabe der Wirtschaftsinformatik in der Dienstleistungsforschung(Wirtschaftsinformatik: Vol. 51, No. 6, 2009) Buhl, Hans Ulrich; Weinhardt, Christof