Publications in Peer-Reviewed Journals

Ellinger, E. W., Gregory, R. W., Mini, T., Widjaja, T., & Henfridsson, O. (2024). Skin in the Game: The Transformational Potential of Decentralized Autonomous Organizations. MIS Quarterly, 48(1), 245-272.

Zimmermann, J., Martin, K. D., Schumann, J. H., & Widjaja, T. (2024) Consumers’ Multistage Data Control in Technology-Mediated Environments. International Journal of Research in Marketing, 41(1), 56-76.

Bidler, M., Zimmermann, J., Schumann, J. H., & Widjaja, T. (2020). Increasing Consumers’ Willingness to Engage in Data Disclosure Processes through Relevance-illustrating Game Elements. Journal of Retailing, 96(4), 507-523.

Widjaja, T., & Gregory, R. W. (2020). Monitoring the Complexity of IT Architectures: Design Principles and an IT Artifact. Journal of the Association for Information Systems, 21(3), 4.

Krasnova, H., Widjaja, T., Buxmann, P., Wenninger, H., & Benbasat, I. (2015). Research Note - Why Following Friends Can Hurt You: An Exploratory Investigation of the Effects of Envy on Social Networking Sites among College-Age Users. Information Systems Research, 26(3), 585-605.

Gerlach, J., Widjaja, T., & Buxmann, P. (2015). Handle with Care: How Online Social Network Providers’ Privacy Policies Impact Users’ Information Sharing Behavior. Journal of Strategic Information Systems, 24(1), 33-43.

Lang, J. C., & Widjaja, T. (2013). OREX-J: Towards a Universal Software Framework for the Experimental Analysis of Optimization Algorithms. OR Spectrum, 35, 735-769.

Widjaja, T., & Buxmann, P. (2012). Kompatibilität von Softwareplattformen. Journal of Business Economics, 82(4), 141-169.

Burkard, C., Widjaja, T., & Buxmann, P. (2012). Software Ecosystems (BISE – Catchword). Business & Information Systems Engineering, 54(1), 43-47.

Becker, A., Widjaja, T., & Buxmann, P. (2011). Nutzenpotenziale und Herausforderungen des Einsatzes von Serviceorientierten Architekturen: Ergebnisse einer empirischen Untersuchung aus Anwender- und Herstellersicht. Wirtschaftsinformatik, 53, 187-199, 2011.

Publications in Conference Proceedings

Ghaffar, A. M., Widjaja, T. & Roider, H. (2023). Towards a Theory to Explain the Effect of Uncertainty on Prosocial Data Disclosure. Proceedings of the 44^th International Conference on Information Systems (ICIS 2023), Hyderabad, India. (Research-in-Progress)

Ghaffar, A. M. & Widjaja, T. (2023). Towards a Theory to Explain Prosocial Data Disclosure - An Explorative Investigation of the Antecedents of Infection Disclosure. Proceedings of the 44^th International Conference on Information Systems (ICIS 2023), Hyderabad, India.

Grüner, A., Sleziona, P., Schumann, J. H. & Widjaja, T. (2023). The Influence of Firm Network Entitativity on Consumers’ Trust Perception and Data Sharing Decisions. Frontiers in Service Conference 2023, Maastricht, Netherlands.

Grüner, A., Sleziona, P., Schumann, J. H. & Widjaja, T. (2023). The Influence of Firm Network Entitativity on Consumers’ Trust Perception and Data Sharing Decisions. Proceedings of the 52^ndEuropean Marketing Association Conference (EMAC 2023), Odense, Denmark.

Zimmermann, J., Schumann, J. H., Widjaja, T., & Martin, K. D. (2022). Investigating Control Perceptions in AI-based Data Disclosure Processes. SERVSIG Conference, Glasgow, United Kingdom.

Zimmermann, J., Schumann, J. H., Widjaja, T., & Martin, K. D. (2022). Investigating Control Perceptions in AI-based Data Disclosure Processes. Frontiers in Service Conference 2022, Boston, MA, USA.

Sleziona, P. & Widjaja, T. (2022). Transparency in the Privacy Context: A Structured Literature Review. Proceedings of the 30^th European Conference on Information Systems (ECIS 2022), Timișoara, Romania, 124.

Overhage, S., & Widjaja, T. (2022). A Taxonomy of Forks in the Context of Decentralized Autonomous Organizations. Proceedings of the 30^th European Conference on Information Systems (ECIS 2022), Timișoara, Romania, 77.

Postel, L., Schumann, J. H., & Widjaja, T. (2022). Stage-Dependent Customer Engagement in Dual-Stage Data Disclosure Decisions: An Evaluation of Affective versus Cognitive Appeals. Proceedings of the 51^st European Marketing Association Conference (EMAC 2022), Budapest, Hungary.

Zimmermann, J., Schumann, J. H., Widjaja, T., & Martin, K. D. (2022). Investigating Control Perceptions in AI-based Data Disclosure Processes. Proceedings of the 51^st European Marketing Association Conference (EMAC 2022), Budapest, Hungary.

Mini, T., Ellinger, E. W., Gregory, R. W., & Widjaja, T. (2021). An Exploration of Governing via IT in Decentralized Autonomous Organizations. Proceedings of the 42^nd International Conference on Information Systems (ICIS 2021), Austin, Texas, USA.

Bidler, M., Zimmermann, J., Schumann, J. H., & Widjaja, T. (2020). Here is How Your Data Help Us Personalize Our Offers to You: Previewing a Meaningfully Gamified Data Disclosure Process to Increase Consumers’ Willingness to Engage in Data Disclosure Processes. Proceedings of the 49^th European Marketing Academy Conference (EMAC 2020), Budapest, Hungary. (cancelled due to COVID-19)

Bidler, M., Schumann, J. H., Widjaja, T., & Zimmermann, J. (2020). Aligning the Data Disclosure Process with Customer Benefits: Employing a Meaningfully Gamified Data Disclosure Process to Increase Data Disclosure Intentions for Personalization Purposes. 2020 AMA Winter Academic Conference, San Diego, CA, USA.

Mini, T., & Widjaja, T. (2019). Tensions in Digital Platform Business Models: A Literature Review. Proceedings of the 40^th International Conference on Information Systems (ICIS 2019), Munich, Germany.

Bidler, M., Schumann, J. H., & Widjaja, T. (2019). Data Disclosure in Business Network Data Exchange Settings: Introducing a Dual Processing Model to Privacy Calculus Theory. Proceedings of the 48^th European Marketing Association Conference (EMAC 2019), Hamburg, Germany.

Steudner, T., Widjaja, T., & Schumann, J. H. (2019). An Exploratory Study of Risk Perception for Data Disclosure to a Network of Firms. Proceedings of the 14^th International Conference on Wirtschaftsinformatik, Siegen, Germany. In: Ludwig, T., Pipek, V. (ed.): Human Practice. Digital Ecologies. Our Future. Siegen Acacemic Press, 1352-1357.  

Stoffer T., Widjaja T., & Zacharias N. (2018). The Diverging Effect of Digitalization on Perceived Relational Conflict during Service Provisions – An Empirical Comparison of Suppliers and Customers in the B2B Context. Proceedings of the 39^th International Conference on Information Systems (ICIS 2018), San Francisco, USA. (Research in Progress)

Stoffer T., Widjaja T., & Zacharias N. (2018). The Effect of Service Modularity on Flexibility in the Digital Age – An Investigation in the B2B Context. In Exploring Service Science: 9th International Conference, IESS 2018, Karlsruhe, Germany, September 19–21, 2018, Proceedings 9 (pp. 3-15). Springer International Publishing. (Best Paper Award)

Bidler, M., Schumann, J. H., & Widjaja, T. (2018). Challenging the Cognitive Privacy Calculus: Affective Reactions in Consumers' Privacy-Related Decision Making. SERVSIG Conference, Paris, France.

Bidler, M., Schumann, J. H., & Widjaja, T. (2018). Challenging the Cognitive Privacy Calculus: Affective Reactions in Consumers' Privacy-Related Decision Making. Proceedings of the 47^th European Marketing Academy Conference (EMAC 2018), Glasgow, United Kingdom.

Engelbrecht, A., Gerlach, J., Widjaja, T., & Buxmann, P. (2017). The Nature of Enterprise-Service-Fit in the Context of Digital Services. Proceedings of the 38^th International Conference on Information Systems (ICIS 2017), Seoul, South Korea. (Nominated for the Best Theory Development Award)

Becker, M., Matt, C., Widjaja, T., & Hess, T. (2017). Understanding Privacy Risk Perceptions of Consumer Health Wearables – An Empirical Taxonomy. Proceedings of the 38^th International Conference on Information Systems (ICIS 2017), Seoul, South Korea.

Brakemeier, H., Widjaja, T., & Buxmann, P. (2016). Distinguishing Usage and Disclosure Intentions in Privacy Research: How our Two Selves Bring About Differences in the Effects of Benefits and Risks. Proceedings of the 24^th European Conference on Information Systems (ECIS 2016), Istanbul, Turkey.

Engelbrecht, A., Gerlach, J., & Widjaja, T. (2016). Understanding the Anatomy of Data-Driven Business Models - Towards an Empirical Taxonomy. Proceedings of the 24^th European Conference on Information Systems (ECIS 2016), Istanbul, Turkey.

Brakemeier, H., Widjaja, T., & Buxmann, P. (2016). Calculating with Different Goals in Mind - The Moderating Role of the Regulatory Focus in the Privacy Calculus. Proceedings of the 24^th European Conference on Information Systems (ECIS 2016), Istanbul, Turkey.

Widjaja, T. (2014). Der kostenoptimale Grad funktionaler Redundanz in IT-Anwendungslandschaften. Lecture Notes in Informatics (LNI), Tagungsband Informatik 2014, Stuttgart, Germany.

Loske, A., Widjaja, T., Benlian, A., & Buxmann, P. (2014). Perceived IT Security Risk in Cloud Adoption: The Role of Perceptual Incongruence Between Users and Providers. Proceedings of the 22^nd European Conference on Information Systems (ECIS 2014), Tel Aviv, Israel. (Nominated for the Best Paper Award)

Schütz, A., Widjaja, T., & Gregory, R. W. (2013). Escape From Winchester Mansion – Toward a Set of Design Principles to Master Complexity in IT Architectures. Proceedings of the 34^th International Conference on Information Systems (ICIS 2013), Milan, Italy.

Kaiser, J., Widjaja, T., & Buxmann, P. (2013). Unfolding Dyadic Dependencies in IS Outsourcing Relationships – Development of Two Multidimensional Constructs.
Proceedings of the 34^th International Conference on Information Systems (ICIS 2013), Milan, Italy. (Research in Progress)

Loske, A., Widjaja, T., & Buxmann, P. (2013). Cloud Computing Providers’ Unrealistic Optimism regarding IT Security Risks: A Threat to Users?. Proceedings of the 34^th International Conference on Information Systems (ICIS 2013), Milan, Italy.

Eling, N., Krasnova, H., Widjaja, T., & Buxmann, P. (2013). Will You Accept an App? Empirical Investigation of the Decisional Calculus Behind the Adoption of Applications on Facebook. Proceedings of the 34^th International Conference on Information Systems (ICIS 2013), Milan, Italy.

Kaiser, J., Widjaja, T., & Buxmann, P. (2013). Relative and Joint Dependence in IS Outsourcing Relationships – A Model of Effects on Relational Facets and Exchange Performance. In advances in Global Sourcing. Models, Governance, and Relationships. 7^th Global Sourcing Workshop. 2013, Val d’Isère, France, Revised Selected Papers, 7, 18-34. Springer Berlin Heidelberg.

Schmidt, C., Widjaja, T., & Schütz, A. (2013). Quantifizierung der Komplexität von IT-Landschaften: Ein systemtheoretischer Ansatz und dessen Anwendung im Rahmen der Architekturtransformation. Lecture Notes in Informatics (LNI), Tagungsband Informatik 2013, Koblenz, Germany.

Schütz, A., Widjaja, T., & Kaiser, J. (2013). Complexity in Enterprise Architectures - Conceptualization and Introduction of a Measure from a System Theoretic Perspective. Proceedings of the 21^st European Conference on Information Systems (ECIS 2013), Utrecht, Holland.

Krasnova, H., Eling, N., Schneider, O., Wenninger, H., Widjaja, T., & Buxmann, P. (2013). Does This App Ask for Too Much Data? The Role of Privacy Perceptions in User Behavior Towards Facebook Applications and Permission Dialogs. Proceedings of the 21^st European Conference on Information Systems (ECIS 2013), Utrecht, Holland.

Loske, A., Widjaja, T., & Buxmann, P. (2013). Unrealistischer Optimismus der Cloud Computing Anbieter bezüglich IT Sicherheitsrisiken – Eine Bedrohung für die Nutzer? Tagungsband der 11. Internationalen Tagung Wirtschaftsinformatik 2013 (WI2013), Leipzig, Germany.

Krasnova, H., Wenninger, H., Widjaja, T., & Buxmann, P. (2013). Envy on Facebook: A Hidden Threat to Users’ Life Satisfaction? Tagungsband der 11. Internationalen Tagung Wirtschaftsinformatik 2013 (WI2013), Leipzig, Germany. (Gewinner des Best-Paper-Awards)

Schütz, A., Widjaja, T., & Kaiser, J. (2013). Komplexität in Enterprise Architectures – Konzeptualisierung und Entwicklung einer Kennzahl aus systemtheoretischer Perspektive. Tagungsband der 11. Internationalen Tagung Wirtschaftsinformatik 2013 (WI2013), Leipzig, Germany.

Ackermann, T., Widjaja, T., & Buxmann, P. (2013). Towards the Optimal Security Level: Quantification of Risks in Service-Based Information Systems. Proceedings of the 46^th Hawaii International Conference on System Sciences (HICSS 2013), Hawaii, USA.

Kaiser, J., Widjaja, T., & Buxmann, P. (2013). A Two-Sided Perspective on Supplier Dependence in IS Outsourcing Dyads. Proceedings of the 46^th Hawaii International Conference on System Sciences (HICSS 2013), Hawaii, USA.

Draisbach, T., Widjaja, T., & Buxmann, P. (2013): Lock-ins in Network Effect Markets – Results of a Simulation Study. Proceedings of the 46^th Hawaii International Conference on System Sciences (HICSS 2013), Hawaii, USA.

Widjaja, T., Kaiser, J., Tepel, T., & Buxmann, P. (2012). Heterogeneity in IT Landscapes and Monopoly Power of Firms: A Model to Quantify Heterogeneity. Proceedings of the 33^rd International Conference on Information Systems (ICIS 2012), Orlando, Florida, USA. (Nominated for the Best Paper Award)

Widjaja, T., & Gregory, R. (2012). Design Principles for Heterogeneity Decisions in Enterprise Architecture Management. Proceedings of the 33^rd International Conference on Information Systems (ICIS 2012), Orlando, Florida, USA. (Research in Progress)

Kaiser, J., Widjaja, T., & Buxmann, P. (2012). Positioning Clients in Dyadic Dependence Structures of IS Outsourcing Relationships – Conceptualization and Empirical Findings. Proceedings of the 33^rd International Conference on Information Systems (ICIS 2012), Orlando, Florida, USA.

Ackermann, T., Widjaja, T., Benlian, A., & Buxmann, P. (2012). Perceived IT Security Risks of Cloud Computing: Conceptualization and Scale Development. Proceedings of the 33^rd International Conference on Information Systems (ICIS 2012), Orlando, Florida, USA.

Kaiser, J., Widjaja, T., & Buxmann, P. (2012). Analyzing Client Dependence in Dyadic IS Outsourcing Relationship. In The Dynamics of Global Sourcing. Perspectives and Practices: 6^th Global Sourcing Workshop 2012, Courchevel, France, Revised Selected Papers, 6, 1-19. Springer Berlin Heidelberg.

Pussep, A., Schief, M., & Widjaja, T. (2012). The Software Value Chain: Methods for Construction and Their Application. Proceedings of the 20^th European Conference on Information Systems (ECIS 2012), Barcelona, Spain.

Draisbach, T., Widjaja, T., & Buxmann, P. (2012). Lock-Ins auf Netzeffektmärkten – Ergebnisse einer Simulationsstudie. Tagungsband der Multikonferenz Wirtschaftsinformatik (MKWI 2012), Braunschweig, Germany.

Burkard, C., Draisbach, T., Widjaja, T., & Buxmann, P. (2011). Software Ecosystems: Vendor-Sided Characteristics of Online Marketplaces. Lecture Notes in Informatics (LNI, Tagungsband Informatik 2011, Berlin.

Pussep, A., Schief, M, Widjaja, T., Buxmann, P., & Wolf, C. M. (2011). The Software Value Chain as an Analytical Framework for the Software Industry and its Exemplary Application for Vertical Integration Measurement. Proceedings of the 17^th American Conference on Information Systems (AMCIS 2011), Detroit, USA.

Ackermann, T., Widjaja, T., & Buxmann, P. (2009). Increasing the Diffusion of Communication Standards – A General Simulation Framework from the Vendor’s Perspective. Proceedings of the 6^th International Conference on Standardization and Innovation in Information Technology (SIIT 2009), 76-91, Tokyo, Japan.

Widjaja, T., & Buxmann, P. (2009). Service-oriented Architectures: Modeling the Selection of Services and Platforms. Proceedings of the 17^th European Conference on Information Systems (ECIS 2009), Verona, Italy, 2009.

Becker, A., Buxmann, P., & Widjaja, T. (2009). Value Potential and Challenges of Service-oriented Architectures – A User and Vendor Perspective. Proceedings of the 17^th European Conference on Information Systems (ECIS 2009), Verona, Italy.

Becker, A., Buxmann, P., & Widjaja, T. (2008). Nutzenpotenziale von Serviceorientierten Architekturen – Ergebnisse einer Expertenbefragung. Tagungsband des dritten Workshops zu Bewertungsaspekten Serviceorientierter Architekturen (BSOA 2008), Leinfelden, Germany.

Lang, J. C., Widjaja, T, Buxmann, P., Domschke, W., & Hess, T. (2008): Optimizing the Supplier Selection and Service Portfolio of a SOA Service Integrator. Proceedings of the 41^st Hawaii International Conference on System Sciences (HICSS 2008), Hawaii, USA.

Rößling, G., Gliesche, F., Jajeh, T., & Widjaja, T. (2004). Enhanced Expressiveness in Scripting Using AnimalScript V2. Proceedings of the 3^rd International Program Visualization Workshop, Warwick, England. Ari Korhonen, 10-17.

Monographs

Widjaja, T. (2011). Standardisierungsentscheidungen in mehrschichtigen Systemen: Untersuchung am Beispiel serviceorientierter Architekturen. Gabler-Verlag, Wiesbaden, Germany

Other Publications

Hennemann, M., v. Lewinski, K. Wawra, D., & Widjaja, T. (Eds.). (2023). Data Disclosure - Global Developments and Perspectives, De Gruyter, Berlin 2023, Germany.

Richthammer, M., & Widjaja, T. (2023). Vectors of Data Disclosure – The Information Systems Perspective, in: Hennemann, M. et al. (Eds.), Data Disclosure – Global Developments and Perspectives, De Gruyter, Berlin 2023, Germany.

Mini, T., Widjaja, T., & Gregory, R. (2020). Autonomy and Alignment in Platform-Based Meta-Organizations: A Qualitative Meta-Analysis. 1st AIS SIG DITE Paper Development Workshop. (Working Paper)

Bidler, M., Steudner, T., Schumann, J. H., & Widjaja, T. (2019). Kundenwahrnehmungen und Kundenverhalten beim Bezahlen von digitalen Dienstleistungen mit persönlichen Daten. Handbuch Datenrecht und Digitalisierung. Erich Schmidt Verlag Berlin.

Strahringer, S., & Widjaja, T. (Eds.). (2017). HMD Praxis der Wirtschaftsinformatik: IT-Management und IT-Strategie, 54. Springer Verlag, Wiesbaden, Germany.

Buxmann, P., Kaiser, J., & Widjaja, T. (2013). Die zehn Faktoren der Abhängigkeit des Kunden in IT-Outsourcing-Beziehungen. Lünendonk Handbuch IT-Consulting 2013, Fakten & Köpfe Verlagsgesellschaft, Kelsterbach, 50-63.

Wenninger, H., Widjaja, T., Buxmann, P., & Gerlach, J. (2012). Der Preis des Kostenlosen. Wirtschaftsinformatik & Management, 12(6), 12-19.

Widjaja, T., Langenbach-Kuttert, B., & Buxmann, P. (2012). Strategisches Management heterogener IT-Landschaften. INFORM, 12(2), 2012.

Hilkert, D., Burkard, C., Widjaja, T., Hess, T., & Buxmann, P. (2011). Plattformoffenheit – Implikationen für Anbieter von Mobile Business App. Smart Mobile Apps, Springer, Berlin.

Widjaja, T., & Buxmann, P. (2012). Compatibility of Software Platforms. Theory-Guided Modeling and Empiricism in Information Systems Research. Physica-Verlag, Heidelberg, Germany. (Based on: Widjaja, Buxmann 2012)

Widjaja, T., & Buxmann, P. (2009). Service-oriented Architectures: Modeling the Selection of Services and Platforms. Software-as-a-Service (SaaS) – Anbieterstrategien, Kundenbedürfnisse und Wertschöpfungsstrukturen, Gabler-Verlag, Wiesbaden, Germany. (Based on: Widjaja, Buxmann 2009)

Langer, K., Voigtmann, A., & Widjaja, T. (2008). SOA-basierte Partnernetzwerke. Manage IT, 1(2), 16-21).

Buxmann, P., Hess, T., & Widjaja, T. (2007). Serviceorientierte Architekturen: Grundlagen und Ansätze zur ökonomischen Bewertung aus Perspektive der Software-Industrie. WiSU das Wirtschaftsstudium, 10, 1316-1327.