Chair of Business Information Systems
Thomas Widjaja

Thomas Widjaja

Foto von Prof. Dr. Thomas Widjaja

Address:
Dr.-Hans-Kapfinger-Straße 12 
94032 Passau 

Room: 212

Phone: +49 851 509-2570
Fax: +49 851 509-2572
Email address: thomas.widjaja@uni-passau.de

Office Hours

Thursday between 11 a.m. and 12 noon (please make an appointment via the Secretary).

 

 

Curriculum Vitae

YearDetails
since 04/2016Professor at the Chair of Business Information Systems at the University of Passau
10/2015 – 03/2016Interim professorship at the University of Passau (Chair of Business Information Systems)
08/2010 – 02/2016 Assistant professor (Habilitand), Chair of Information Systems (Prof. Dr. Peter Buxmann) at the Technische Universität Darmstadt 
07/2014 – 08/2014 Visiting researcher at the Management Information Systems DivisionThe University of British Columbia
10/2013 – 11/2013Visiting researcher at the Information Systems Department; IESE Business School; Barcelona 
03/2012 – 05/2012Visiting researcher at the Center for Digital Innovation, Technology, and Strategy; Robert H. Smith School of Business; University of Maryland 
07/2010Degree: PhD in Economic Sciences (Dr. rer. pol.) summa cum laude
Dissertation topic: “Standardisierungsentscheidungen in mehrschichtigen Systemen – Untersuchung am Beispiel serviceorientierter Architekturen“ (Standardization Decisions in Multilayer Systems – Analysis by the Example of Service-oriented Architectures) 
01/2007 – 07/2010PhD student and research assistant , Chair of Information Systems (Prof. Dr. Peter Buxmann) at the Technische Universität Darmstadt
10/2001 – 01/2007  Studies of Information Systems (Wirtschaftsinformatik) at the Technische Universität Darmstadt, Germany as well as at the Universität St. Gallen, Switzerland and National University of Singapore (NUS)

Awards and Grants

YearAwards
03/2013 Best Paper Award; 11th International Conference on Wirtschaftsinformatik, Leipzig, Germany.    
11/2011 E-Teaching-Prize, Carlo and Karin Giersch-Foundation, Darmstadt, Germany.    
10/2011 TARGION science award for the best IS PhD Thesis by INTARGIA Managementberatung GmbH (patronage: Hessian Minister for Science and the Arts), Frankfurt, Germany.    
06/2008 Best Master Thesis, SEW-EURODRIVE-Foundation, Bruchsal, Germany.    
05/2007 Best Graduate of the Information Systems Program, Technische Universität Darmstadt (spring 2007), Darmstadt, Germany.    
02/2007–07/2009 PhD Fellowship, FAZIT- STIFTUNG Gemeinnützige Verlagsgesellschaft mbH, Frankfurt, Germany.    
12/2004 – 05/2005     DAAD Scholarship for Study abroad at the National University of Singapore.    
08/2004 – 12/2005     DUO Fellowship Award, State of Singapore.   

List of Publications (Selected Publications)

Krasnova, Hanna; Widjaja, Thomas; Buxmann, Peter; Benbasat, Izak; Wenninger, Helena: 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, 2015.

Gerlach, Jin; Widjaja, Thomas; Buxmann, Peter: Handle with Care: How Online Social Network Providers’ Privacy Policies Impact Users’ Information Sharing Behavior. Journal of Strategic Information Systems, 24 (1), 33-43, 2015.

Schütz, Alexander; Widjaja, Thomas; Gregory, Robert Wayne:
Escape From Winchester Mansion – Toward a Set of Design Principles to Master Complexity in IT Architectures. Proceedings of International Conference on Information Systems (ICIS 2013), Milan, Italy, 2013.

Widjaja, Thomas; Kaiser, Jasmin; Tepel, Dennis; Buxmann, Peter: Heterogeneity in IT Landscapes and Monopoly Power of Firms: A Model to Quantify Heterogeneity. Proceedings of International Conference on Information Systems (ICIS 2012), Orlando, USA, 2012. (Nominated for the Best-Paper-Award)

Widjaja, Thomas; Gregory, Robert: Design Principles for Heterogeneity Decisions in Enterprise Architecture Management. Proceedings of International Conference on Information Systems (ICIS 2012), Orlando, USA, 2012.

Lang, Christian; Widjaja, Thomas: OREX-J – Towards a Universal Software Framework for the Experimental Analysis of Optimization Algorithms. OR Spectrum, 2012.

Widjaja, Thomas; Buxmann, Peter: Kompatibilität von Softwareplattformen. Journal of Business Economics (JBE), 2012.

Publications (Complete List)

Strahringer, Susanne; Widjaja, Thomas (Guest Editor): HMD Praxis der Wirtschaftsinformatik: IT-Management und IT-Strategie (Vol. 54). Wiesbaden: Springer, 2017.

Brakemeier, Hendrik; Widjaja, Thomas; Buxmann, Peter: Distinguishing Usage and Disclosure Intentions in Privacy Research: How our Two Selves Bring About Differences in the Effects of Benefits and Risks. Proceedings of European Conference on Information Systems (ECIS), Istanbul, Turkey, 2016.

Engelbrecht, Adrian; Gerlach, Jin; Widjaja, Thomas: Understanding the Anatomy of Data-Driven Business Models - Towards an Empirical Taxonomy. Proceedings of European Conference on Information Systems (ECIS), Istanbul, Turkey, 2016.

Brakemeier, Hendrik; Widjaja, Thomas; Buxmann, Peter: Calculating with Different Goals in Mind - The Moderating Role of the Regulatory Focus in the Privacy Calculus. Proceedings of European Conference on Information Systems (ECIS), Istanbul, Turkey, 2016.

Krasnova, Hanna; Widjaja, Thomas; Buxmann, Peter; Benbasat, Izak; Wenninger, Helena: 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, 2015.

Gerlach, Jin; Widjaja, Thomas; Buxmann, Peter: Handle with Care: How Online Social Network Providers’ Privacy Policies Impact Users’ Information Sharing Behavior. Journal of Strategic Information Systems, 24 (1), 33-43, 2015.

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

Loske, André; Widjaja, Thomas; Benlian, Alexander; Buxmann, Peter: Perceived IT Security Risk in Cloud Adoption: The Role of Perceptual Incongruence Between Users and Providers. Proceedings of the 22th European Conference on Information Systems (ECIS 2014), Tel Aviv, Israel, 2014. (Nominated for the Best-Paper-Award)

Schütz, Alexander; Widjaja, Thomas; Gregory, Robert Wayne:
Escape From Winchester Mansion – Toward a Set of Design Principles to Master Complexity in IT Architectures. Proceedings of International Conference on Information Systems (ICIS 2013), Milan, Italy, 2013.

Kaiser, Jasmin; Widjaja, Thomas; Buxmann, Peter:
Unfolding Dyadic Dependencies in IS Outsourcing Relationships – Development of Two Multidimensional Constructs.
 Proceedings of International Conference on Information Systems (ICIS 2013), Milan, Italy, 2013. (Research in Progress)

Loske, André; Widjaja, Thomas; Buxmann, Peter:
Cloud Computing Providers’ Unrealistic Optimism regarding IT Security Risks: A Threat to Users?
 Proceedings of International Conference on Information Systems (ICIS 2013), Milan, Italy, 2013.

Eling, Nicole; Krasnova, Hanna; Widjaja, Thomas; Buxmann, Peter:
Will You Accept an App? Empirical Investigation of the Decisional Calculus Behind the Adoption of Applications on Facebook.
 Proceedings of International Conference on Information Systems (ICIS 2013), Milan, Italy, 2013.

Kaiser, Jasmin; Widjaja, Thomas; Buxmann, Peter:
Relative and Joint Dependence in IS Outsourcing Relationships – A Model of Effects on Relational Facets and Exchange Performance, in: Oshri, Ilan; Kotlarsky, Julia; Willcocks, Leslie (Hrsg.): Advances in Global Sourcing. Models, Governance, and Relationships. Lecture Notes in Business Information Processing, Springer Verlag, Berlin, 2012.

Schmidt, Christian; Widjaja, Thomas; Schütz, Alexander: 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, 2013.

Schütz, Alexander; Widjaja, Thomas; Kaiser, Jasmin: Complexity in Enterprise Architectures - Conceptualization and Introduction of a Measure from a System Theoretic Perspective. Proceedings of the 21th European Conference on Information Systems (ECIS 2013), Utrecht, Holland, 2013.

Krasnova, Hanna; Eling, Nicole; Schneider, Oleg; Wenninger, Helena; Widjaja, Thomas; Buxmann, Peter: 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 21th European Conference on Information Systems (ECIS 2013), Utrecht, Holland, 2013.

Loske, André; Widjaja, Thomas; Buxmann, Peter: Unrealistischer Optimismus der Cloud Computing Anbieter bezüglich IT Sicherheitsrisiken – Eine Bedrohung für die Nutzer? Tagungsband der 11. Internationalen Tagung Wirtschaftsinformatik 2013 (WI2013), Leipzig, Deutschland, 2013.

Krasnova, Hanna; Wenninger, Helena; Widjaja, Thomas; Buxmann, Peter: Envy on Facebook: A Hidden Threat to Users’ Life Satisfaction? Tagungsband der 11. Internationalen Tagung Wirtschaftsinformatik 2013 (WI2013), Leipzig, Deutschland, 2013. (Best-Paper-Award)

Schütz, Alexander; Widjaja, Thomas; Kaiser, Jasmin: Komplexität in Enterprise Architectures – Konzeptualisierung und Entwicklung einer Kennzahl aus systemtheoretischer Perspektive. Tagungsband der 11. Internationalen Tagung Wirtschaftsinformatik 2013 (WI2013), Leipzig, Deutschland, 2013.

Ackermann, TobiasWidjaja, ThomasBuxmann, PeterTowards the Optimal Security Level: Quantification of Risks in Service-Based Information Systems. Proceedings of Hawaii International Conference on System Sciences (HICSS-46), Hawaii, USA, 2013.

Kaiser, JasminWidjaja, ThomasBuxmann, PeterA Two-Sided Perspective on Supplier Dependence in IS Outsourcing Dyads. Proceedings of Hawaii International Conference on System Sciences (HICSS-46), Hawaii, USA, 2013.

Draisbach, Tobias; Widjaja, Thomas; Buxmann, Peter: Lock-ins in Network Effect Markets – Results of a Simulation Study. Proceedings of Hawaii International Conference on System Sciences (HICSS-46), Hawaii, USA, 2013.

Buxmann, Peter; Kaiser, Jasmin; Widjaja, Thomas: Die zehn Faktoren der Abhängigkeit des Kunden in IT-Outsourcing-Beziehungen, in: Canibol, Hans-Peter; Hossenfelder, Jörg; Lünendonk, Thomas (Hrsg.): Lünendonk Handbuch IT-Consulting 2013, Fakten & Köpfe Verlagsgesellschaft, Kelsterbach, 50-63, 2013.

Wenninger, HelenaWidjaja, ThomasBuxmann, PeterGerlach, Jin: Der Preis des Kostenlosen. Wirtschaftsinformatik & Management, 12 (6), 12-19, 2012.

Widjaja, Thomas; Kaiser, Jasmin; Tepel, Dennis; Buxmann, Peter: Heterogeneity in IT Landscapes and Monopoly Power of Firms: A Model to Quantify Heterogeneity. Proceedings of International Conference on Information Systems (ICIS 2012), Orlando, USA, 2012. (Nominated for the Best-Paper-Award)

Widjaja, Thomas; Gregory, Robert: Design Principles for Heterogeneity Decisions in Enterprise Architecture Management. Proceedings of International Conference on Information Systems (ICIS 2012), Orlando, USA, 2012. (Research in Progress)

Kaiser, Jasmin; Widjaja, Thomas; Buxmann, Peter: Positioning Clients in Dyadic Dependence Structures of IS Outsourcing Relationships – Conceptualization and Empirical Findings. Proceedings of International Conference on Information Systems (ICIS 2012), Orlando, USA, 2012.

Ackermann, Tobias; Widjaja, Thomas; Benlian, Alexander; Buxmann, Peter: Perceived IT Security Risks of Cloud Computing: Conceptualization and Scale Development. Proceedings of International Conference on Information Systems (ICIS 2012), Orlando, USA, 2012.

Kaiser, Jasmin; Widjaja, Thomas; Buxmann, Peter: Analyzing Client Dependence in Dyadic IS Outsourcing Relationship, in: Kotlarsky, Julia; Oshri, Ilan; Willcocks, Leslie (Hrsg.):The Dynamics of Global Sourcing: Perspectives and Practices. Lecture Notes in Business Information Processing, Springer Verlag, Berlin, 2012.

Lang, Christian; Widjaja, Thomas: OREX-J – Towards a Universal Software Framework for the Experimental Analysis of Optimization Algorithms. OR Spectrum, 2012.

Widjaja, Thomas; Buxmann, Peter: Kompatibilität von Softwareplattformen. Journal of Business Economics (JBE), 2012.

Pussep, Anton; Schief, Markus; Widjaja, Thomas: The Software Value Chain: Methods for Construction and Their Application. European Conference on Information Systems (ECIS 2012), Barcelona, Spanien, 2012.

Widjaja, Thomas; Langenbach-Kuttert, Birgit; Buxmann, Peter: Strategisches Management heterogener IT-Landschaften. INFORM, 12 (2), 2012.

Draisbach, Tobias; Widjaja, Thomas; Buxmann, Peter: Lock-Ins auf Netzeffektmärkten – Ergebnisse einer Simulationsstudie. Tagungsband der Multikonferenz Wirtschaftsinformatik (MKWI 2012), Braunschweig, 2012.

Kaiser, Jasmin; Widjaja, Thomas; Buxmann, Peter: A Client Perspective on Dyadic Dependencies in IS Outsourcing Relationships. The Sixth Global Sourcing Workshop, Courchevel, Frankreich, 2012.

Burkard, Christoph; Widjaja, Thomas; Buxmann, Peter: Software Ecosystems. Business & Information Systems Engineering, 54 (1), 43-47, 2012.

Hilkert, Daniel; Burkard, Christoph; Widjaja, Thomas; Hess, Thomas; Buxmann, Peter: Plattformoffenheit – Implikationen für Anbieter von Mobile Business Apps, in: Verclas, Stephan; Linnhoff-Popien, Claudia (Hrsg.): Smart Mobile Apps, Springer, Berlin, 2011.

Becker, Alexander; Widjaja, Thomas; Buxmann, Peter: Nutzenpotenziale und Herausforderungen des Einsatzes von Serviceorientierten Architekturen: Ergebnisse einer empirischen Untersuchung aus Anwender- und Herstellersicht. Business & Information Systems Engineering, 53 (4), 187-199, 2011.

Burkard, Christoph; Draisbach, Tobias; Widjaja, Thomas; Buxmann, Peter: Software Ecosystems: Vendor-Sided Characteristics of Online Marketplaces. Lecture Notes in Informatics (LNI) – Tagungsband Informatik 2011, Berlin, 2011.

Widjaja, Thomas: Standardisierungsentscheidungen in mehrschichtigen Systemen – Untersuchung am Beispiel serviceorientierter Architekturen, Gabler, Wiesbaden, 2011.

Widjaja, Thomas; Buxmann, Peter: Compatibility of Software Platforms. in: Heinzl, Armin; Buxmann, Peter; Wendt, Oliver; Weitzel, Tim (Hrsg): Theory-Guided Modeling and Empiricism in Information Systems Research. Physica-Verlag, Heidelberg, 2011. (Based on Widjaja, Buxmann 2012)

Pussep, AntonSchief, MarkusWidjaja, ThomasBuxmann, PeterWolf, Christian MichaelThe Software Value Chain as an Analytical Framework for the Software Industry and Its Exemplary Application for Vertical Integration Measurement. Proceedings of the American Conference on Information Systems (AMCIS 2011), Detroit, USA, 2011.

Widjaja, Thomas; Buxmann, Peter: Service-oriented Architectures: Modeling the Selection of Services and Platforms, in: Benlian, Alexander; Hess, Thomas; Buxmann, Peter (Hrsg): Software-as-a-Service (SaaS) – Anbieterstrategien, Kundenbedürfnisse und Wertschöpfungsstrukturen, Gabler-Verlag, Wiesbaden, 2010. (Based on Widjaja, Buxmann 2009)

Ackermann, Tobias; Widjaja, Thomas; Buxmann, Peter: Increasing the Diffusion of Communication Standards – A General Simulation Framework from the Vendor’s Perspective. Proceedings of the 6th International Conference on Standardization and Innovation in Information Technology (SIIT 2009), 76-91, Tokyo, Japan, 2009.

Widjaja, Thomas; Buxmann, Peter: Service-oriented Architectures: Modeling the Selection of Services and Platforms. Proceedings of the European Conference on Information Systems (ECIS 2009), Verona, Italien, 2009.

Becker, Alexander; Buxmann, Peter; Widjaja, Thomas: Value Potential and Challenges of Service-oriented Architectures – A User and Vendor Perspective. Proceedings of the European Conference on Information Systems (ECIS 2009), Verona, Italien, 2009.

Becker, Alexander; Buxmann, Peter; Widjaja, Thomas: Nutzenpotenziale von Serviceorientierten Architekturen – Ergebnisse einer Expertenbefragung. Tagungsband des dritten Workshops zu Bewertungsaspekten Serviceorientierter Architekturen (BSOA 2008), Leinfelden, 2008.

Langer, Kim; Voigtmann, Andreas; Widjaja, Thomas: SOA-basierte Partnernetzwerke. Manage IT, 1(2), 16-21, 2008.

Lang, Jan Christian; Widjaja, Thomas; Buxmann, Peter; Domschke, Wolfgang; Hess, Thomas: Optimizing the Supplier Selection and Service Portfolio of a SOA Service Integrator. Proceedings of Hawaii International Conference on System Sciences (HICSS-41), Hawaii, 2008. (Nominated for the Best-Paper-Award)

Buxmann, Peter; Hess, Thomas; Widjaja, Thomas: Serviceorientierte Architekturen: Grundlagen und Ansätze zur ökonomischen Bewertung aus Perspektive der Software-Industrie. WiSU das Wirtschaftsstudium, 10, 1316-1327, 2007.

Rößling, Guido; Gliesche, Felix; Jajeh, Thomas; Widjaja, Thomas: Enhanced Expressiveness in Scripting Using AnimalScript V2. Proceedings of the Third International Program Visualization Workshop, Warwick, England. Ari Korhonen (Hrsg.), 10-17, University of Warwick, Coventry, UK, 2004.