TY - GEN AU - Ortmann, Regina AU - Warkulat, Sonja AU - Krull, Sebastian AU - Klocke, Nina AU - Pelster, Matthias ID - 41197 TI - COVID-19 Reporting and Willingness to Pay for Leisure Activities VL - 83 ER - TY - GEN AU - Ortmann, Regina AU - Simons, Dirk AU - Voeller, Dennis ID - 41184 TI - Real effects of an international tax reform for MNEs VL - 64 ER - TY - GEN AU - Yigitbas , Osman ID - 40473 TI - Preisabsprachen in der Automobilindustrie - eine wettbewerbspolitische Analyse ER - TY - GEN AU - Schulte, Marcel ID - 40470 TI - Facebooks digitale Währung - eine wettbewerbspolitische Analyse ER - TY - CHAP AU - Meydani, Elnaz AU - Düsing, Christoph AU - Trier, Matthias ID - 35758 SN - 2195-4968 T2 - Lecture Notes in Information Systems and Organisation TI - Towards a Trust-Aware Item Recommendation System on a Graph Autoencoder with Attention Mechanism ER - TY - CONF AB - Over the last years, several approaches for the data-driven estimation of expected possession value (EPV) in basketball and association football (soccer) have been proposed. In this paper, we develop and evaluate PIVOT: the first such framework for team handball. Accounting for the fast-paced, dynamic nature and relative data scarcity of hand- ball, we propose a parsimonious end-to-end deep learning architecture that relies solely on tracking data. This efficient approach is capable of predicting the probability that a team will score within the near future given the fine-grained spatio-temporal distribution of all players and the ball over the last seconds of the game. Our experiments indicate that PIVOT is able to produce accurate and calibrated probability estimates, even when trained on a relatively small dataset. We also showcase two interactive applications of PIVOT for valuing actual and counterfactual player decisions and actions in real-time. AU - Müller, Oliver AU - Caron, Matthew AU - Döring, Michael AU - Heuwinkel, Tim AU - Baumeister, Jochen ID - 24547 KW - expected possession value KW - handball KW - tracking data KW - time series classification KW - deep learning T2 - 8th Workshop on Machine Learning and Data Mining for Sports Analytics (ECML PKDD 2021) TI - PIVOT: A Parsimonious End-to-End Learning Framework for Valuing Player Actions in Handball using Tracking Data ER - TY - CONF AB - In early 2021, the finance world was taken by storm by the dramatic price surge of the GameStop Corp. stock. This rise is being, at least in part, attributed to a group of Redditors belonging to the now-famous r/wallstreetbets (WSB) subreddit group. In this work, we set out to address if user activity on the WSB subreddit is associated with the trading volume of the GME stock. Leveraging a unique dataset containing more than 4.9 million WSB posts and comments, we assert that user activity is associated with the trading volume of the GameStop stock. We further show that posts have a significantly higher predictive power than comments and are especially helpful for predicting unusually high trading volume. Lastly, as recent events have shown, we believe that these findings have implications for retail and institutional investors, trading platforms, and policymakers, as these can have disruptive potential. AU - Caron, Matthew AU - Gulenko, Maryna AU - Müller, Oliver ID - 25029 KW - Retail investors KW - GameStop KW - Social Networks KW - Reddit KW - WallStreetBets T2 - 42nd International Conference on Information Systems (ICIS 2021) TI - To the Moon! Analyzing the Community of “Degenerates” Engaged in the Surge of the GME Stock ER - TY - CONF AU - Meydani, Elnaz AU - Düsing, Christoph AU - Trier, Matthias ID - 44073 T2 - Innovation Through Information Systems: Volume II: A Collection of Latest Research on Technology Issues TI - Towards a Trust-Aware Item Recommendation System on a Graph Autoencoder with Attention Mechanism ER - TY - JOUR AU - Kaimann, Daniel AU - Tanneberg, Ilka AU - Cox, Joe ID - 21289 IS - 1 JF - Managerial and Decision Economics SN - 0143-6570 TI - “I will survive”: Online streaming and the chart survival of music tracks VL - 42 ER - TY - GEN AU - N., N. ID - 42317 TI - Die Aufteilung der Barentsseegebiete mithilfe des Adjusted Winner Verfahrens bei asymmetrischen Machtverhältnissen ER - TY - GEN AU - N., N. ID - 42315 TI - Versionisierung von Serviceleistungen auf Videoplattformen ER - TY - GEN AU - N., N. ID - 42321 TI - Kindergarten Allocation through Matching Mechanisms ER - TY - GEN AU - N., N. ID - 42309 TI - Faire Profitverteilung in Energienetzwerken - eine spieltheoretische Analyse von Microgrids ER - TY - GEN AU - N., N. ID - 42311 TI - "First-Party-Content" auf zweiseitigen Märkten ER - TY - GEN AU - N., N. ID - 42314 TI - Stability in many-to-many matchings with contracts ER - TY - GEN AU - N., N. ID - 42313 TI - Preissetzungsstrategien für Neuprodukte ER - TY - GEN AU - N., N. ID - 42310 TI - Co-opetition in Two-Sided Markets ER - TY - GEN AU - N., N. ID - 42312 TI - Matching mit Minderheiten ER - TY - GEN AU - N., N. ID - 42316 TI - Piracy and Visioning ER - TY - GEN AU - N., N. ID - 42303 TI - Revenue Sharing Contracts: Horizontale Koordination in der E-Commerce-Logistik ER -