Chair of Internet and Telecommunications Business
Research

Research

The Chair's research activities focus on the analysis of firms as well as the design of markets and services in the Internet and telecommunications industry. Our research addresses technical, strategic, economic as well as policy questions and employs an interdisciplinary pluralism of methods, tailored to best address the respective research question.

Area of research

The area of research of the Chair is inherently interdisciplinary, because it is located in the triad of economics, computer science and law.

Due to the importance of the Internet and telecommunications industry for social and economic activities, our research enjoys high practical relevance and presence. Therefore, the Chair takes an active part in the public discussion and the exchange of knowledge with industry partners. Thereby, the research of the Chair is able to combine academic rigor with practical relevance. Due to this fact our research is funded, both by government institutions (e.g., the German research foundation (DFG)) as well as by industry partners within the framework of cooperation projects. Moreover, our research is regularly published by the most prestigious scientific journals (e.g., Information Systems Research or Management Science).

Research Topics

Focus Areas:

  1. Economics and Regulation of the Internet and data economy (e.g., on data-sharing agreements)
  2. Economics and Regulation of the Internet-ecosystem (e.g., on net neutrality)
  3. Competition and investment in telecommunications networks (e.g., incentives to invest in Next-Generation-Networks)
  4. Design and perception of electronic markets and services (e.g., design of Internet auctions)

Furthermore, the chair is interested in research topics that address the intelligent use of information and communication technology to empower the efficient and sustainable use of natural resources (e.g., smart metering).    

Research Methods

In our research, we predominantly employ quantitative methods from economics (e.g., game-theoretical modelling, experimental economics) as well as quantitative methods from computer science (e.g., (agent-based) simulation or data mining). Depending on the research question, these methodical approaches are enriched by approaches and theories of neighboring disciplines, such as mathematics (e.g., Operations Research), psychology (e.g. psychometric and psychophysiological measurements) and law (e.g., telecommunications and competition law).

Publications

Data Economy and Regulation

Krämer, J.; Schnurr, D.; Wohlfarth, M. 2017
Winners, Losers, and Facebook: The Role of Social Logins in the Online Advertising Ecosystem, Management Science, forthcoming [VHB-JQ: A+; IF: 2.822; WI: A; ABS: Grade 4*]

Krämer, J., Wohlfarth, M. 2017
Market power, regulatory convergence, and the role of data in digital markets. Telecommunications Policy, forthcoming. DOI: 10.1016/j.telpol.2017.10.004 [VHB-JQ: C; IF: 0.982; ABS: Grade 1]

Wohlfarth, M. 2017
Data Portability on the Internet: An Economic Analysis. Proceedings of International Conference on Information Systems (ICIS 2017), Seoul, South Korea, 2017, forthcoming[VHB-JQ3: A]
(nominate for best theory paper award) 

Regulation of the Internet-ecosystem, in particular net neutrality

Easley, R., Guo, H., Krämer, J. 2017
From Network Neutrality to Data Neutrality: A Techno-Economic Framework and Research Agenda. Information Systems Research. forthcoming http://ssrn.com/abstract=2666217 [VHB-JQ: A+; IF: 3.047; WI: A; ABS: Grade 4*]

Krämer, J; Wohlfarth, M. 2015
Regulating Over-the-Top Service Providers in Two-Sided Content Markets: Insights from the Economic Literature. Communications & Strategies 99. 51-71. 

Kourandi, F.; Krämer, J.; Valletti, T. 2015
Net Neutrality, Exclusivity Contracts and Internet Fragmentation. Information Systems Research 26(2). 320—338. DOI: 10.1287/isre.2015.0567 [VHB-JQ: A+; IF: 2.436; WI: A; ABS: Grade 4*]

Krämer, J.; Wiewiorra, L.; Weinhardt, C. 2013
Net Neutrality: A Progress Report. Telecommunications Policy 37(9). 794–813 DOI: 10.1016/j.telpol.2012.08.005 [VHB-JQ: C; IF: 1.411; ABS: Grade 1]

Krämer, J.; Wiewiorra, L. 2012
Network Neutrality and Congestion Sensitive Content Providers: Implications for Content Variety, Broadband Investment and Regulation. Information Systems Research 23(4). 1303—1321. DOI: 10.1287/isre.1120.0420 [VHB-JQ: A+; IF: 2.436; WI: A; ABS: Grade 4*]Gewinner des VHB-Nachwuchspreises 2013

Krämer, J.; Wiewiorra, L.; Weinhardt, C. 2012
Net Neutrality in the United States and Europe. CPI Antitrust Chronicle 3(2). Article 3.

Krämer, J. 2013
Tariffication, Prioritization and Regulation: Eight Essays on Telecommunications Markets. Unveröffentlichte Habilitationsschrift. Karlsruhe Institute of Technology. 250 p.

Spiecker gen. Döhmann, I.; Krämer, J. (eds.). 2011
Network Neutrality and Open Access. Baden Baden: Nomos Verlag. 214 p.
[Buchbesprechung durch Hunziker, M. in Archiv für Urheber- und Medienrecht (UFITA), 2012(2), 604-606]

Design and Perception of Electronic Markets, in particular Internet-Auctions

Müller, M.; Adam, M. T. P.; Cornforth, D.; Chiong, R.; Krämer, J.; Weinhardt, C. 2016
Selecting Phyiological Features for Predicting Bidding Behavior in Electronic AuctionsProceedings of the 49th Hawaii International Conference on System Sciences (HICSS 2016). (Kauai, Hawaii, USA). 
[VHB-JQ: C, WI: B]

Astor, P.; Adam, M. T. P.; Krämer, J. 2016

Affective Images, Emotion Regulation and Auction Behavior: A Psychophysiological Experiment on the Role of Unconscious Emotional Processes in Internet Auctions, Journal of Interactive Marketing 35. 56-59 [VHB-JQ: B, ABS: Grade 3, IF: 2.773]

Adam, M. T. P.; Krämer, J.; Müller, M. 2015
Auction Fever! How time pressure and social competition affect bidders’ arousal and bids in retail auctions. Journal of Retailing 91. 468-485  DOI: 10.1016/j.jretai.2015.01.003 [VHB-JQ: A, ABS: Grade 4, IF: 1.754]

Adam, M.T.P.; Krämer, J.; Weinhardt, C. 2012
Excitement up! Price Down! Measuring Emotions in Dutch Auctions. International Journal of Electronic Commerce 17(2). 7—39. DOI: 10.2753/JEC1086-4415170201 [VHB-JQ: B; IF: 1.872; WI: B; ABS: Grade 3]

Adam, M. T. P.; Krämer, J.; Jähnig, C.; Seifert, S.; Weinhardt, C. 2011
Understanding Auction Fever: A Framework for Emotional Bidding. Electronic Markets 21(3). 197—207. DOI: 10.1007/s12525-011-0068-9 [VHB-JQ: B; IF: 0.935; WI: A; ABS: Grade 2]

Astor, P. J.; Adam, M. T. P.; Krämer, J. 2012
Influence of emotional pictures on bidding behavior. in: Smidts, A.; Sanfey, A.; Reimann, M.; Schilke, O. (eds.), Proceedings of the 2012 NeuroPsychoEconomics Conference. (Rotterdam, Netherlands). 18

Adam, M. T. P.; Gamer, M.; Krämer, J.; Weinhardt, C. 2011
Measuring Emotions in Electronic Markets. Proceedings of the International Conference on Information Systems 2011 (ICIS). (Shanghai, China). Paper 1. [VHB-JQ: A, WI: A]

Adam, M. T. P.; Krämer, J.; Weinhardt, C.; Ehrhart, K.-M. 2010
Investigating Auction Fever. in: Dreier, T.; Krämer, J.; Studer, R.; Weinhardt, C. (eds.), Information Management and Market Engineering: Vol. II. Studies on eOrganisation and Market Engineering. Karlsruhe: KIT Scientific Publishing. 141—157.

Design and Perception of Electronic Services, in particular Telecommunications Tariffs

Krämer, J; Wiewiorra, L. 2015
When 'just' is just not enough: Why consumers do not appreciate non-neutral Internet access services. Business and Information Systems Engineering 57(5). 325-338 DOI: 10.1007/s12599-015-0398-9 [VHB-JQ: B; IF: 1.700; WI: A]

Krämer, J; Wiewiorra, L. 2015
When 'just' is just not enough: Why consumers do not appreciate non-neutral Internet access services. Business and Information Systems Engineering 57(5). 325-338 DOI: 10.1007/s12599-015-0398-9 [VHB-JQ: B; IF: 1.700; WI: A]

Köhler, P.; Krämer, J.; Krüger, L.  2014
Optimal Choice and Consumption of Cost Cap Tariffs: Theory and Empirical Evidence.
Business Research 7(1). 161–190. DOI: 10.1007/s40685-014-0007-7 [VHB-JQ: B]

Krämer, J.; Wiewiorra, L. 2014
Data Caps and Two-Sided Pricing: Evaluating Managed Service Business Models. Proceedings of the 22nd European Conference on Information Systems (ECIS 2014). (Tel Aviv, Israel). [VHB-JQ: B, WI: A]

Elsner, H.; Krämer, J. 2013
Managing Corporate Portal Usage with Recommender Systems. Business and Information Systems Engineering 5(4). 213—225 DOI: 10.1007/s12599-013-0275-3 [VHB-JQ: B; IF: 1.700; WI: A]

Elsner, H.; Krämer, J. 2013
Nutzungsmanagement von Unternehmensportalen mithilfe von Empfehlungssystemen. Wirtschaftsinformatik 55(4). 205—219 DOI: 10.1007/s11576-013-0370-6 [VHB-JQ: B; IF: 1.700; WI: A]

Krämer, J.; Wiewiorra, L. 2012
Beyond the Flat Rate Bias: The Flexibility Effect in Tariff Choice. Telecommunications Policy 36(1). 29—39. DOI: 10.1016/j.telpol.2011.11.015 [VHB-JQ: C; IF: 1.411; ABS: Grade 1]

Krämer, J.; Wiewiorra, L. 2010
The Taxi Meter Effect: An Experimental Approach. in: de Vreede, G. (ed.), Group Decision and Negotiation 2010. (Delft, Netherlands), 228—231.

Köhler, P.; Krämer, J.; Anandasivam, A. 2010
Cloud Computing: New Business Opportunities for Telecommunications Companies?. Proceedings of the 2010 European Regional ITS Conference. (Copenhagen, Denmark)

Krämer, J.; Wiewiorra, L. 2010
Consumer Perception of Mobile Telephony Tariffs with Cost Caps. Proceedings of the 9th Conference on Telecommunication, Media and Internet Techno-Economics (CTTE). (Ghent, Belgium). IEEE Xplore, 1—8. DOI: 10.1109/ctte.2010.5557703 [Best Paper Award Runner Up] 

Elsner, H.; Krämer, J. 2010
Einsatz von Recommender Systemen zum Management von Unternehmensportalen. in: Schumann, M.; Kolbe, L.; Breitner, M.; Friedrichs, A. (eds.), Multikonferenz Wirtschafsinformatik 2010. Universitätsverlag Göttingen. 1819—1830. [VHB-JQ: D; WI: C] 

Krämer, J.; Conte, T.; Blau, B.; van Dinther, C.; Weinhardt, C. 2010
Service Value Networks: Unleashing the Combinatorial Power of Service Mashups. Working Paper, Karlsruhe Institute of Technology.
http://ssrn.com/abstract=1582902

Blau, B.; Krämer, J.; Conte, T.; van Dinther, C. 2009
Service Value Networks. in: Hofreiter, B.; Werthner, H. (eds.), Proceedings of the 11th IEEE Conference on Commerce and Enterprise Computing (Vienna, Austria) IEEE Computer Society. 194—201.  DOI: 10.1109/CEC.2009.64 [WI: B]

Krämer, J. 2013
Deutsche Telekom: Sind Fair-Use-Flatrates wirklich fair? Wirtschaftsdienst 93(5). 282. Kommentar.

Wiewiorra, L.; Krämer, J.; Weinhardt, C.; Ehrhart, K.-M. 2010
Consumer Perception of Time Based Pricing. in: Dreier, T.; Krämer, J.; Studer, R.; Weinhardt, C. (eds.), Information Management and Market Engineering: Vol. II. Studies on eOrganisation and Market Engineering. Karlsruhe: KIT Scientific Publishing. 179—190.

Krämer, J. 2013
Tariffication, Prioritization and Regulation: Eight Essays on Telecommunications Markets. Unveröffentlichte Habilitationsschrift. Karlsruhe Institute of Technology. 250 p.

Regulation, Competition and Investment in Telecommunications Networks

Krämer, J.; Vogelsang, I. 2017
Co-Investments and Tacit Collusion in Regulated Network Industries: Experimental Evidence. Working Paper.  Review of Network Economics 15(1). 35-61 http://ssrn.com/abstract=2119927

Horstmann, N.; Krämer, J.; Schnurr, D. 2016
Wholesale Competition, Open Access Regulation and Tacit Collusion: Experimental Evidence
http://ssrn.com/abstract=2630660

Horstmann, N.; Krämer, J.; Schnurr, D. 2015
Oligopoly Competition in Continuous Time
http://ssrn.com/abstract=2630664

Horstmann, N.; Krämer, J.; Schnurr, D. 2015
Number Effects in Oligopolies: How Many Competitors are Enough to Ensure Competition? http://ssrn.com/abstract=2535862

Krämer, J.; Schnurr, D. 2014
A Unified Framework for Open Access Regulation of Telecommunications Infrastructure: Review of the Economic Literature and Policy Guidelines. Telecommunications Policy 38(11). 1160–1179. DOI: 10.1016/j.telpol.2014.06.006 [VHB-JQ: C; IF: 1.411; ABS: Grade 1]

Horstmann, N.; Krämer, J. 2014
Tacit collusion under multimarket contact with identical firms and markets. Mimeo. Presented under the title "Price Signaling and Tacit Collusion under Multimarket Contact" at the 41st Annual Conference of the European Association for Research in Industrial Economics (EARIE) in Milan, Italy, 2014.
http://ssrn.com/abstract=2469452

Horstmann, N.; Krämer, J. 2013
Price Discrimination or Uniform Pricing: Which Colludes More? Economics Letters 120(3). 397–383. DOI: 10.1016/j.econlet.2013.05.011 [VHB-JQ: B; IF: 0.510; ABS: Grade 3]

Krämer, J. 2009
Bundling Vertically Differentiated Communications Services to Leverage Market Power. info: The journal for policy, regulation and strategy for telecommunications, information and media 11(3). 64—74. DOI: 10.1108/14636690910954980

Krämer, J. 2007
Digital Convergence, Pricing Strategies and Firms' Profits in the Telecommunication and Entertainment Media Industry. Proceedings of the 6th Conference on Telecommunication, Media and Internet Techno-Economics (CTTE). (Helsinki, Finland). IEEE Xplore, 1—8. DOI: 10.1109/CTTE.2007.4389896

Krämer, J.; Berninghaus, S.; Weinhardt, C. 2006
Competing on Many Fronts: Entry Networks in an Economy of Multi-Product Firms. in: Dreier, T.; Studer, R.; Weinhardt, C. (eds.), Information Management and Market Engineering. Studies on eOrganisation and Market Engineering. Universitätsverlag Karlsruhe. 139—151.

Krämer, J. 2013
Tariffication, Prioritization and Regulation: Eight Essays on Telecommunications Markets. Unveröffentlichte Habilitationsschrift. Karlsruhe Institute of Technology. 250 p.

Spiecker gen. Döhmann, I.; Krämer, J. (eds.). 2011
Network Neutrality and Open Access. Baden Baden: Nomos Verlag. 214 p.
[Buchbesprechung durch Hunziker, M. in Archiv für Urheber- und Medienrecht (UFITA), 2012(2), 604-606]

Krämer, J.; Seifert, S. (eds.). 2009
Communications Regulation in the Age of Digital Convergence: Legal and Economic Perspectives. Karlsruhe: Universitätsverlag Karlsruhe. 110 p.

Krämer, J. 2009
Bundling Telecommunications Services: Competitive Strategies for Converging Markets. Karlsruhe: Universitätsverlag Karlsruhe. 174 p.

Energy and Environment

Feige, C., Ehrhart, K.-M., Krämer, J. 2017
Climate Negotiations in the Lab: A Threshold Public Goods Game with Heterogeneous Contributions Costs and Non-binding Voting. Environmental and Resource Economics. 1—20 DOI: 10.1007/s10640-017-0123-x Dalen, A.; Krämer, J.; 2016

Dalen, A.; Krämer, J. 2016
Towards a user-centered feedback design for smart meter interfaces to support efficient energy-use choices: A design science approach. Business & Information Systems Engineering / Wirtschaftsinformatik 59(5). 361-373 
[VHB-JQ: B; IF: 1.700; WI: A; ABS: Grade 2]

Dalen, A.; Krämer, J.; Weinhardt, C. 2013
Determining the Optimal Level of Information Granularity for Efficient Energy Consumption Decisions: Experimental Evidence. Proceedings of the 21st European Conference on Information Systems (ECIS 2013). (Utrecht, Netherlands). Paper 201. [VHB-JQ: B, WI: A]

Ilg, J.; Flath, C.; Krämer, J. 2012
A Note on the Economics of Metered Grid Pricing. Proceedings of the 9th International Conference on the European Energy Market (EEM).(Florence, Italy). IEEE Xplore, 1—6.

Publications on other topics

Mazarakis, A.; Krämer, J. 2010
Feedbackmechanismen zur Steigerung der Beteiligung im Web 2.0–Ergebnisse einer Feldstudie zu Vorlesungswikis. in: Schroeder, U. (ed.), Interaktive Kulturen- Workshop-Band. (Duisburg, Germany) Proceedings der Workshops der DeLFI 2010 - Die 8. E-Learning Fachtagung Informatik der Gesellschaft für Informatik e. V. Berlin: Logos Verlag. 187—192.

Seifert, S.; Krämer, J.; Mazarakis, A. 2010
Anreize zur Nutzung von Wikis in der Hochschullehre - Ergebnisse eines Pilotprojekts. in: Ziegler, J.; Schmidt, A. (eds.), Mensch & Computer 2010. (Duisburg, Germany). München: Oldenbourg Wissenschaftsverlag. 179—188

Dreier, T.; Krämer, J.; Studer, R.; Weinhardt, C. (eds.). 2010
Information Management and Market Engineering: Vol. II. Studies on eOrganisation and Market Engineering. No. 11. Karlsruhe: KIT Scientific Publishing. 260 p.

Krämer, A.; Krämer, J. 2010
Flexibility of Delivery Frequency in Logistics Competition. Working Paper, Karlsruhe Institute of Technology.
http://ssrn.com/abstract=1583015

Krämer, J. 2009
The Conference Scheduling Problem. Saarbrücken: VDM Verlag. 160 p.

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