TY - CONF AU - Schryen, Guido AU - Marrone, Mauricio AU - Yang, Jiaqi ID - 47427 T2 - Proceedings of the 57th Hawaii International Conference on System Science (HICSS 2024) TI - Adopting Generative AI for Literature Reviews: An Epistemological Perspective ER - TY - CONF AU - Betke, Hans AU - Sperling, Martina AU - Schryen, Guido AU - Sackmann, Stefan ID - 47429 T2 - Proceedings of the 57th Hawaii International Conference on System Science (HICSS 2024) TI - A Design Theory for Spontaneous Volunteer Coordination Systems in Disaster Response ER - TY - BOOK AB - Das Herausgeberwerk präsentiert aktuelle Forschungsergebnisse und praktische Erkenntnisse aus dem Bereich von digitalen Plattformen und Ökosystemen im Business-to-Business-Kontext. Dabei liegt der Schwerpunkt auf empirischen und konzeptionellen Beiträgen. Neben Grundlagen, Enablern und Fallstudien werden ebenso mögliche Vorgehensweisen zur Entwicklung von Plattformen behandelt. Praktikerinnen und Praktiker aus den Bereichen Management, Strategische Planung und Business Development erhalten Impulse, um Digitale Plattformen und Ökosysteme erfolgreich voranzutreiben und so Potenziale innerhalb ihres Unternehmens zu realisieren. Forschende, Lehrende und Studierende aus den Bereichen Digitale Plattformen und Ökosysteme aus dem Business-to-Business-Kontext dienen die Beiträge als Anregung für intensive Diskussionen. ED - Schallmo, Daniel R. A. ED - Kundisch, Dennis ED - Lang, Klaus ED - Hasler, Daniel ID - 48640 TI - Digitale Plattformen und Ökosysteme im B2B-Bereich - Fallstudien, Ansätze, Technologien und Tools ER - TY - JOUR AU - Schryen, Guido ID - 50301 JF - Journal of Parallel and Distributed Computing TI - Speedup and efficiency of computational parallelization: A unifying approach and asymptotic analysis ER - TY - JOUR AB - We propose an indicator for detecting anomalous stock market valuation in real time such that market participants receive timely signals so as to be able to take stabilizing action. Unlike existing approaches, our anomaly indicator introduces three methodological novelties. First, we use an endogenous, purely data-driven, nonparametric trend identification method to separate long-term market movements from more short-term ones. Second, we apply SETAR models that allow for asymmetric expansions and contractions around the long-term trend and find systematic stock price cycles. Third, we implement these findings in our indicator and conduct real-time market forecasts, which have so far been neglected in the literature. Applications of our indicator using monthly S&P 500 stock data from 1970 to the end of 2022 show that short-term anomalous market movements can be identified in real time up to one year ahead. We predict all major anomalies, including the 1987 Bubble and the initial phase of the Financial Crisis that began in 2007. In total, our anomaly indicator identifies more than 80% of all – even minor – anomalous episodes. Thus, smoothing market exaggerations through early signaling seems possible. AU - Fritz, Marlon AU - Gries, Thomas AU - Wiechers, Lukas ID - 50719 JF - Quantitative Finance KW - General Economics KW - Econometrics and Finance KW - Finance SN - 1469-7688 TI - An early indicator for anomalous stock market performance ER - TY - JOUR AU - Greil, Stefan AU - Kaluza-Thiesen, Eleonore AU - Schulz, Kim Alina AU - Sureth-Sloane, Caren ID - 50747 JF - Deutsches Steuerrecht TI - Komplexität von Verrechnungspreisen und Tax Compliance: Einblicke in deutsche Unternehmen VL - 62 ER - TY - JOUR AU - Schön, Lena AU - Graßl, Benjamin AU - Giese, Henning ID - 49868 JF - Steuer und Wirtschaft TI - Die Kriterien und Zusammensetzung der EU-Blacklist als Grundlage des Steueroasen-Abwehrgesetzes – Eine kritische Würdigung ER - TY - JOUR AU - Stumpe, Miriam ID - 52092 JF - Transportation Research Procedia SN - 2352-1465 TI - A new mathematical formulation for the simultaneous optimization of charging infrastructure and vehicle schedules for electric bus systems VL - 78 ER - TY - JOUR AU - Lammert, Olesja AU - Richter, Birte AU - Schütze, Christian AU - Thommes, Kirsten AU - Wrede, Britta ID - 52202 JF - Frontiers in Behavioral Economics TI - Humans in XAI: Increased Reliance in Decision-Making Under Uncertainty by Using Explanation Strategies ER - TY - JOUR AU - Seutter, Janina AU - Müller, Michelle AU - Müller, Stefanie Jutta Marianne AU - Kundisch, Dennis ID - 52206 JF - Internet Research TI - Moment or movement – the heterogeneous impact of the Black Lives Matter movement on personal and societal charitable crowdfunding campaigns ER - TY - JOUR AB - The editorial introduces the special issue Knowledge by Design in Education: Key challenges and experiences from research practice, posing key questions, offering an insight into ongoing discussions, and presenting an overview of the included articles. AU - Brase, Alexa Kristin AU - Jenert, Tobias ID - 52702 IS - 1 JF - EDeR. Educational Design Research SN - 2511-0667 TI - Knowledge by Design in Education VL - 8 ER - TY - JOUR AB - Individual cognitive functioning declines over time. We seek to understand how adverse physical health shocks in older ages contribute to this development. By use of event-study methods and data from the USA, England, and several countries in Continental Europe, we find evidence that health shocks lead to an immediate and persistent decline in cognitive functioning. This robust finding holds in all regions representing different health insurance systems and seems to be independent of underlying individual demographic characteristics such as sex and age. We also ask whether variables that are susceptible to policy action can reduce the negative consequences of a health shock. Our results suggest that neither compulsory education nor retirement regulations moderate the effects, thus emphasizing the importance for cognitive functioning of maintaining good physical health in old age. AU - Schiele, Valentin AU - Schmitz, Hendrik ID - 35637 JF - European Economic Review TI - Understanding cognitive decline in older ages: The role of health shocks VL - 151 ER - TY - CONF AU - zur Heiden, Philipp AU - Priefer, Jennifer AU - Beverungen, Daniel ID - 35893 T2 - Proceedings of the 56th Conference on System Sciences TI - Location-Based Service and Location-Contextualizing Service: Conceptualizing the Co-creation of Value with Location Information ER - TY - CONF AU - Ksouri-Gerwien, C. AU - Vorbohle, Christian ID - 33488 T2 - Proceedings of the 55th Hawaii International Conference on System Sciences (HICSS) TI - Supporting Business Model Decision-making in B2B Ecosystems: A Framework for Using System Dynamics ER - TY - JOUR AB - AbstractWe examine distortions caused by tax base allocation systems–separate accounting (SA) or formula apportionment (FA)–with respect to the allocation of assets and workforce within multinational entities (MNEs). The effects of both systems are intensively debated by EU Member States as they are striving to implement a European tax system. Its introduction would lead to a switch from SA to FA. Moreover, Pillar One of the recent global tax reform includes a mix of both tax base allocation systems. We find that, against the claims of the EU, FA does not necessarily create lower distortions of the factor allocation. Decisive for that assessment is the level of profit shifting under SA. Our results indicate that, in tendency, the factor allocation is more severely distorted by FA when the profit shifting possibilities were rather low under SA. In contrast to former studies, we highlight the importance of analyzing the status quo under the recently applied system (SA) in order to be able to assess the consequences of a switch from SA to FA. Our results are interesting for policy-makers as they help anticipating reactions of MNEs to a change in the applied tax base allocation system and for companies as a basis for future tax planning. AU - Ortmann, Regina AU - Pummerer, Erich ID - 41192 JF - Journal of Business Economics KW - Economics and Econometrics KW - Business and International Management SN - 0044-2372 TI - Distortional effects of separate accounting and formula apportionment on factor allocation ER - TY - JOUR AB - Der Verein für Socialpolitik hat zur Bearbeitung seines Schwerpunktthemas „Nachwuchs“ für die Dauer der Kalenderjahre 2021-2022 eine Arbeitsgruppe eingerichtet – im Folgenden: AG Nachwuchs –, deren Aufgabe das Vorlegen eines umfassenden Berichts zur Situation der VWL-Promovierenden und -PostDocs im DACH-Raum ist. Gestützt auf Datenerhebungen und strukturierte Interviews formuliert die AG Nachwuchs in diesem Bericht zwei Empfehlungen, jeweils eine für den Doc- und den PostDoc-Bereich. Sie empfiehlt im PostDoc-Bereich, dass die Fakultäten bzw. verwandte VWL-Einrichtungen den Übergang zu Tenure-Track beschleunigen und ihn durch eine systematische Planung der Zahlenverhältnisse zwischen den Karrierestufen bei ihrem wissenschaftlichen Personal begleiten. Dadurch sollen bessere Karriereperspektiven erreicht werden. Sowohl die befragten Nachwuchskräfte als auch die befragten Professor:innen und Programmleitungen betonen die Thematik der Stellenperspektiven stark. Im Doc-Bereich dokumentieren die Erhebungsdaten eine überraschend geringe Zufriedenheit der VWL-Promovierenden mit der Betreuungssituation durch die Professorenschaft. Die AG Nachwuchs empfiehlt daher eine höhere Betreuungsdichte und eine stärkere Vernetzung von Promovierenden. Weitere Hilfestellungen für Promovierende können in Mehrfach- oder Teambetreuungen sowie in der Bereitstellung von Informationen über die Vielfalt möglicher Karrierewege bestehen. AU - Bayer, Christian AU - Englmaier, Florian AU - Riphahn, Regina AU - Schmidt-Dengler, Philipp AU - Sondergeld, Virgina AU - Sureth-Sloane, Caren AU - von Wangenheim, Jonas AU - Weizsäcker, Georg ID - 37562 JF - Perspektiven der Wirtschaftspolitik TI - Beste Bedingungen für junge Ökonominnen und Ökonomen? Neue Daten und Empfehlungen der Arbeitsgruppe “Nachwuchs” im Verein für Socialpolitik ER - TY - JOUR AB - We propose a new method to estimate and isolate the localization of knowledge spillovers due to the physical presence of a person, using after-application but pre-grant deaths of differently located coinventors of the same patent. The approach estimates the differences in local citations between the deceased and still-living inventors at increasingly distant radii. Patents receive 26 percent fewer citations from within a radius of 20 miles around the deceased, relative to still-living coinventors. Differences attenuate with time and distance, are stronger when still-living coinventors live farther from the deceased, and hold for a subsample of possibly premature deaths. (JEL O31, O33, O34, R32) AU - Balsmeier, Benjamin AU - Fleming, Lee AU - Lück, Sonja ID - 42638 IS - 1 JF - American Economic Review: Insights KW - Management KW - Monitoring KW - Policy and Law KW - Geography KW - Planning and Development SN - 2640-205X TI - Isolating Personal Knowledge Spillovers: Coinventor Deaths and Spatial Citation Differentials VL - 5 ER - TY - GEN AU - Tiessen, Michelle ID - 43058 TI - Zur Effektivität des europäischen Kronzeugenprogramms - Der Fall des LKW-Kartells ER - TY - JOUR AU - Greil, Stefan AU - Overesch, Michael AU - Rohlfing-Bastian, Anna AU - Schreiber, Ulrich AU - Sureth-Sloane, Caren ID - 42635 IS - 4 JF - Intertax TI - Towards an Amended Arm´s Length Principle - Tackling Complexity and Implementing Destination Rules in Transfer Pricing VL - 51 ER - TY - JOUR AB - We study how competition between physicians affects the provision of medical care. In our theoretical model, physicians are faced with a heterogeneous patient population, in which patients systematically vary with regard to both their responsiveness to the provided quality of care and their state of health. We test the behavioral predictions derived from this model in a controlled laboratory experiment. In line with the model, we observe that competition significantly improves patient benefits as long as patients are able to respond to the quality provided. For those patients, who are not able to choose a physician, competition even decreases the patient benefit compared to a situation without competition. This decrease is in contrast to our theoretical prediction implying no change in benefits for passive patients. Deviations from patient-optimal treatment are highest for passive patients in need of a low quantity of medical services. With repetition, both, the positive effects of competition for active patients as well as the negative effects of competition for passive patients become more pronounced. Our results imply that competition can not only improve but also worsen patient outcome and that patients’ responsiveness to quality is decisive. AU - Brosig-Koch, Jeannette AU - Hehenkamp, Burkhard AU - Kokot, Johanna ID - 44092 JF - Health Economics KW - physician competition KW - patient characteristics KW - heterogeneity in quality responses KW - fee-for-service KW - laboratory experiment TI - Who benefits from quality competition in health care? A theory and a laboratory experiment on the relevance of patient characteristics ER - TY - GEN AB - We consider a model where for-profit providers compete in quality in a price-regulated market that has been opened to competition, and where the incumbent is located at the center of the market, facing high costs of relocation. The model is relevant in markets such as public health care, education and schooling, or postal services. We find that, when the regulated price is low or intermediate, the entrant strategically locates towards the corner of the market to keep the incumbent at the low monopoly quality level. For a high price, the entrant locates at the corner of the market and both providers implement higher quality compared to a monopoly. In any case, the entrant implements higher quality than the incumbent provider. Social welfare is always higher in a duopoly if the cost of quality is low. For higher cost levels welfare is non-monotonic in the price and it can be optimal to the regulator not to use its entire budget. Therefore, the welfare effect of entry depends on the price and the size of the entry cost, and the regulator should condition the decision to allow entry on an assessment of the entry cost. AU - Hehenkamp, Burkhard AU - Kaarbøe, Oddvar M. ID - 44093 KW - Quality competition KW - Price regulation KW - Location choice KW - Product differentiation TI - Price Regulation, Quality Competition and Location Choice with Costly Relocation ER - TY - JOUR AU - Burmeister, Sascha Christian AU - Schryen, Guido ID - 42179 JF - Energy Systems TI - Distribution Network Optimization: Predicting computation times to design scenario analysis for network operators ER - TY - CONF AU - Althaus, Maike AU - Müller, Michelle AU - Vorbohle, Christian AU - Kundisch, Dennis ID - 44444 T2 - Proceedings of the International Conference on Challenges in Managing Smart Products and Services (CHIMSPAS 2023) TI - Business Models for Cultural Event Platforms – A Taxonomy Approach ER - TY - CONF AU - Laux, Florian AU - Poniatowski, Martin AU - Kundisch, Dennis ID - 44053 T2 - Proceedings of the 31st European Conference on Information Systems (ECIS) TI - May I have your Attention, please? – The Interaction between Attention Screening and Reputation on Crowdworking Platforms ER - TY - CONF AB - Market transactions are subject to information asymmetry about the delivered value proposition, causing transaction costs and adverse market effects among buyers and sellers. Information systems research has investigated how review systems can reduce information asymmetry in business-to-consumer markets. However, these systems cannot be readily applied to business-to-business markets, are vulnerable to manipulation, and suffer from conceptual weak spots since they use textual data or star ratings. Building on design science research, we conceptualize a new class of reputation systems based on monetary-based payments as quantitative ratings for each transaction stored on a blockchain. Using cryptography, we show that our system assures content confidentiality so that buyers can share and sell their ratings selectively, establishing a reputation ecosystem. Our prescriptive insights advance the design of reputation systems and offer new paths to understanding the antecedents, dynamics, and consequences to reduce information asymmetry in B2B transactions. AU - Hemmrich, Simon AU - Bobolz, Jan AU - Beverungen, Daniel AU - Blömer, Johannes ID - 44855 T2 - ECIS 2023 Research Papers TI - Designing Business Reputation Ecosystems — A Method for Issuing and Trading Monetary Ratings on a Blockchain ER - TY - CONF AU - Seutter, Janina AU - Bartelheimer, Christian AU - Kundisch, Dennis ID - 43027 T2 - Proceedings of the 18th International Conference on Design Science Research in Information Systems and Technology TI - Supporting Innovation through B2B Reviews – A Taxonomy of B2B Online Review Environments ER - TY - CONF AU - Jabr, Wael AU - Gutt, Dominik AU - Neumann, Jürgen AU - Kundisch, Dennis ID - 40063 T2 - Proceedings of the 45th ISMS Marketing Science Conference TI - Updating at the Expense of Demand? The Case of Platform Apps ER - TY - JOUR AB - Many applications are driven by Machine Learning (ML) today. While complex ML models lead to an accurate prediction, their inner decision-making is obfuscated. However, especially for high-stakes decisions, interpretability and explainability of the model are necessary. Therefore, we develop a holistic interpretability and explainability framework (HIEF) to objectively describe and evaluate an intelligent system’s explainable AI (XAI) capacities. This guides data scientists to create more transparent models. To evaluate our framework, we analyse 50 real estate appraisal papers to ensure the robustness of HIEF. Additionally, we identify six typical types of intelligent systems, so-called archetypes, which range from explanatory to predictive, and demonstrate how researchers can use the framework to identify blind-spot topics in their domain. Finally, regarding comprehensiveness, we used a random sample of six intelligent systems and conducted an applicability check to provide external validity. AU - Kucklick, Jan-Peter ID - 45299 JF - Journal of Decision Systems KW - Explainable AI (XAI) KW - machine learning KW - interpretability KW - real estate appraisal KW - framework KW - taxonomy SN - 1246-0125 TI - HIEF: a holistic interpretability and explainability framework ER - TY - GEN AU - Kempkes, Jens Peter AU - Kreuzhage, Katharina AU - Kundisch, Dennis AU - Seutter, Janina AU - Weskamp, Christoph ID - 45364 TI - Digitale Transformation im Theater – Mittels Besucherforschung und Entscheidungsunterstützung zur besseren Angebotsgestaltung VL - 172 ER - TY - JOUR AU - Althaus, Maike AU - Müller, Stefanie Jutta Marianne AU - Kundisch, Dennis ID - 45444 JF - International Journal of Cultural Policy TI - What Price Culture? – A Taxonomy of the Admission Pricing Policy at Museums ER - TY - GEN AU - Laux, Florian AU - Haff, André AU - Kundisch, Dennis ID - 45365 TI - Crowdwork in the Age of Algorithms – How Algorithmic Requesters affect the Meaningfulness of Crowdwork ER - TY - JOUR AU - Schryen, Guido AU - Sperling, Martina ID - 44361 IS - September JF - Computers & Operations Research TI - Literature Reviews in Operations Research: A New Taxonomy and a Meta Review VL - 157 ER - TY - JOUR AU - Dieter, Peter AU - Caron, Matthew AU - Schryen, Guido ID - 44383 IS - 1 JF - European Journal of Operational Research (EJOR) TI - Integrating driver behavior into last-mile delivery routing: Combining machine learning and optimization in a hybrid decision support framework VL - 311 ER - TY - CHAP AU - Gottschalk, Sebastian AU - Vorbohle, Christian AU - Kundisch, Dennis AU - Engels, Gregor AU - Wünderlich, Nacy V. ED - Haake, Claus-Jochen ED - Meyer auf der Heide, Friedhelm ED - Platzner, Marco ED - Wachsmuth, Henning ED - Wehrheim, Heike ID - 45897 T2 - On-The-Fly Computing -- Individualized IT-services in dynamic markets TI - Architectural Management of OTF Computing Markets VL - 412 ER - TY - CHAP AU - Haake, Claus-Jochen AU - Hehenkamp, Burkhard AU - Polevoy, Gleb ED - Haake, Claus-Jochen ED - Meyer auf der Heide, Friedhelm ED - Platzner, Marco ED - Wachsmuth, Henning ED - Wehrheim, Heike ID - 45878 T2 - On-The-Fly Computing -- Individualized IT-services in dynamic markets TI - The Market for Services: Incentives, Algorithms, Implementation VL - 412 ER - TY - CHAP AU - Elrich, Alina AU - Kaimann, Daniel AU - Fahr, René AU - Kundisch, Dennis AU - Mir Djawadi, Behnud AU - Müller, Michelle AU - Poniatowski, Martin AU - Schäfers, Sabrina AU - Frick, Bernd ED - Haake, Claus-Jochen ED - Meyer auf der Heide, Friedhelm ED - Platzner, Marco ED - Wachsmuth, Henning ED - Wehrheim, Heike ID - 45880 T2 - On-The-Fly Computing -- Individualized IT-services in dynamic markets TI - Empirical Analysis in Markets for OTF Services VL - 412 ER - TY - JOUR AU - Fochmann, Martin AU - Heinemann-Heile, Vanessa AU - Huber, Hans-Peter AU - Maiterth, Ralf AU - Sureth-Sloane, Caren ID - 42897 IS - 2 JF - Steuer und Wirtschaft TI - Zusatzkosten der Besteuerung – Eine Analyse des steuerlichen Verwaltungsaufwands und der subjektiv wahrgenommenen Steuerbelastung VL - 100 ER - TY - JOUR AU - Dieter, Peter AU - Stumpe, Miriam AU - Ulmer, Marlin Wolf AU - Schryen, Guido ID - 45816 JF - Transportation Research Part D TI - Anticipatory Assignment of Passengers to Meeting Points for Taxi-Ridesharing VL - 121 ER - TY - CHAP AU - Schwabl, Franziska AU - Daniel-Söltenfuß, Desiree ID - 45918 SN - 2512-1170 T2 - Organisation zwischen Theorie und Praxis TI - Gelingensbedingungen gestaltungsorientierter Schulentwicklung ER - TY - CHAP AU - Ksouri-Gerwien, Christoph AU - Vorbohle, Christian ED - Schallmo, D.R.A. ED - Kundisch, Dennis ED - Lang, K. ID - 37704 T2 - Digitale Plattformen und Ökosysteme im B2B-Bereich TI - Anwendung von System Dynamics zur Geschäftsmodellinnovation in einem B2B-Ökosystem ER - TY - JOUR AU - Unterstell, Rembert ID - 46471 IS - 1 JF - german research – Magazine of the Deutsche Forschungsgemeinschaft TI - „Allowing the Economy to Breathe Even During the Crisis“ – Interview with Tax Expert Caren Sureth-Sloane ER - TY - GEN AU - Kundisch, Dennis ID - 46491 TI - #DIGITALENTS - Digital Talents Programm geht in die zweite Runde VL - 1 ER - TY - JOUR AU - Kempkes, J. P. AU - Kreuzhage, K. AU - Kundisch, Dennis AU - Seutter, Janina AU - Weskamp, Christoph ID - 45656 JF - Kultur Management Network Magazin TI - Digitale Transformation im Theater – Mittels Besucherforschung und Entscheidungsunterstützung zur besseren Angebotsgestaltung VL - 172 ER - TY - GEN AB - We study the effect of education on health (hospital stays, number of diagnosed conditions, self-rated poor health, and obesity) over the life-cycle in Germany, using compulsory schooling reforms as a source of exogenous variation. Our results suggest a positive correlation of health and education which increases over the life-cycle. We do not, however, find any positive local average treatment effects of an additional year of schooling on health or health care utilization for individuals up to age 79. An exception is obesity, where positive effects of schooling start to be visible around age 60 and become very large in age group 75-79. The results in age group 75-79 need to be interpreted with caution, however, due to small sample size and possible problems of attrition. AU - Schmitz, Hendrik AU - Tawiah, Beatrice Baaba ID - 46534 KW - Education KW - health KW - life-cycle effects KW - compulsory schooling TI - Life-cycle health effects of compulsory schooling VL - 1006 ER - TY - GEN AU - Freise, Diana AU - Schiele, Valentin AU - Schmitz, Hendrik ID - 46521 KW - General Earth and Planetary Sciences KW - General Environmental Science SN - 1556-5068 TI - Housing Situations and Local COVID-19 Infection Dynamics – A Case Study With Small-Area Data ER - TY - GEN AB - We study the effect of education on vaccination against COVID-19 and influenza in Germany and Europe. Our identification strategy makes use of changes in compulsory schooling laws and allows to estimate local average treatment effects for individuals between 59 and 91 years of age. We find no significant effect of an additional year of schooling on vaccination status in Germany. Pooling data from Europe, we conclude that schooling increases the likelihood to vaccinate against COVID by an economically negligible effect of one percentage point (zero for influenza). However, we find indications that additional schooling increases fear of side effects from COVID vaccination. AU - Monsees, Daniel AU - Schmitz, Hendrik ID - 46536 KW - COVID KW - influenza KW - vaccination KW - education KW - compulsory schooling TI - The effect of compulsory schooling on vaccination against COVID and Influenza VL - 1011 ER - TY - CONF AU - Althaus, Maike AU - Grieger, Nicole AU - Vorbohle, Christian AU - Müller, Michelle AU - Kundisch, Dennis ID - 46646 TI - Business Models for Cultural Event Platforms - A Taxonomy Approach ER - TY - CONF AU - Garnefeld, I. AU - Böhm, Eva AU - Hanf, L. AU - Helm, S. ID - 46665 T2 - 2023 AMA Summer Academic Conference, San Francisco, CA TI - Unboxing video effectiveness – Does speech matter? ER - TY - CONF AU - Kessing, K. AU - Garnefeld, I. AU - Böhm, Eva ID - 46666 T2 - EMAC Annual Conference, Odense, Denmark TI - The dark and bright side of online reviews in manufacturer online shops ER - TY - CONF AU - Hanf, L. AU - Garnefeld, I. AU - Böhm, Eva AU - Helm, S. ID - 46667 T2 - EMAC Annual Conference, Odense, Denmark TI - Stimulating engagement with unboxing videos – Does speech matter? ER -