Laitenberger, Ulrich, Steffen Viete, Olga Slivkó, Michael Kummer, Kathrin Borchert and Matthias Hirth (2023), Unemployment and Online Labor - Evidence from Microtasking, Management Information Systems Quarterly 47(2), 771-802.

Hinnosaar, Marit, Toomas Hinnosaar, Michael Kummer and Olga Slivkó (2021), Wikipedia Matters, Journal of Economics & Management Strategy .

Kummer, Michael, Olga Slivkó and Xiaoquan (Michael) Zhang (2020), Unemployment and Digital Public Goods Contribution, Information Systems Research 31(3).

Breunig, Christoph, Michael Kummer, Jörg Ohnemus and Steffen Viete (2019), Information Technology Outsourcing and Firm Productivity: Eliminating Bias from Selective Missingness in the Dependent Variable, The Econometrics Journal 23(1), 88-114.

Kummer, Michael and Patrick Schulte (2019), When Private Information Settles the Bill: Money and Privacy in Google’s Market for Smartphone Applications, Management Science 65(8), 3470-3494.

Kummer, Michael, Marianne Saam, Iassen Halatchliyski and George Giorgidze (2016), Centrality and Content Creation in Networks - The Case of Economic Topics on German Wikipedia, Information Economics and Policy Volume 36, Issue C, 36-52.

Hackl, Franz, Michael Kummer, Rudolf Winter-Ebmer and Christine Zulehner (2014), Market Structure and Market Performance in E-Commerce, European Economic Review 68, 199-218.

Hackl, Franz, Michael Kummer and Rudolf Winter-Ebmer (2014), 99 Cent: Price Points in E-Commerce, Information Economics and Policy 26, 12-27.

Slivkó, Olga, Michael Kummer and Marianne Saam (2016), Identification of Causal Effects in the Context of Mass Collaboration , in: Ulrike Cress, Johannes Moskaliuk, Heisawn Jeong Computer-Supported Collaborative Learning Series, Vol. 16 , Springer-Verlag 391-411

Kummer, Michael (2014), ICT, Search Behavior and Market Outcomes, Dissertation, Mannheim.

Giorgidze, George, Torsten Grust, Iassen Halatchliyski and Michael Kummer (2013), Analysing the entire Wikipedia history with Database Supported Haskell, in: Kostis Sagonas Proceedings Series: Lecture Notes in Computer Science, Vol. Vol. 7752 , Springer-Verlag , Rome, Italy,

Janßen, Rebecca, Reinhold Kesler, Michael Kummer and Joel Waldfogel (2022), GDPR and the Lost Generation of Innovative Apps, NBER Working Papers , Cambridge, MA.

Kummer, Michael, Ulrich Laitenberger, Cyrus E. Rich, Danny R. Hughes and Turgay Ayer (2021), Healthy Reviews! Online Physician Ratings Reduce Healthcare Interruptions, ZEW Discussion Paper No. 21-075, Mannheim

Chen, Xiaomeng, Chris Forman and Michael Kummer (2021), Chat More and Contribute Better: An Empirical Study of a Knowledge-Sharing Community, ZEW Discussion Paper No. 21-061, Mannheim

Kesler, Reinhold, Michael Kummer and Patrick Schulte (2019), Competition and Privacy in Online Markets: Evidence from the Mobile App Industry, ZEW Discussion Paper No. 19-064, Mannheim

Hinnosaar, Marit, Toomas Hinnosaar, Michael Kummer and Olga Slivkó (2019), Externalities in Knowledge Production: Evidence from a Randomized Field Experiment, ZEW Discussion Paper No. 19-007, Mannheim

Laitenberger, Ulrich, Steffen Viete, Olga Slivkó, Michael Kummer, Kathrin Borchert and Matthias Hirth (2018), Unemployment and Online Labor, ZEW Discussion Paper No. 18-023, Mannheim , published in : Management Information Systems Quarterly

Kesler, Reinhold, Michael Kummer and Patrick Schulte (2017), Mobile Applications and Access to Private Data: The Supply Side of the Android Ecosystem, ZEW Discussion Paper No. 17-075, Mannheim

Breunig, Christoph, Michael Kummer, Jörg Ohnemus and Steffen Viete (2016), IT Outsourcing and Firm Productivity: Eliminating Bias from Selective Missingness in the Dependent Variable, ZEW Discussion Paper No. 16-092, Mannheim

Kummer, Michael and Patrick Schulte (2016), When Private Information Settles the Bill: Money and Privacy in Google’s Market for Smartphone Applications, ZEW Discussion Paper No. 16-031, Mannheim

Hinnosaar, Marit, Toomas Hinnosaar, Michael Kummer and Olga Slivkó (2015), Does Wikipedia Matter? The Effect of Wikipedia on Tourist Choices, ZEW Discussion Paper No. 15-089, Mannheim

Kummer, Michael, Olga Slivkó and Michael Zhang (2015), Economic Downturn and Volunteering: Do Economic Crises Affect Content Generation on Wikipedia?, ZEW Discussion Paper No. 15-078, Mannheim

Kummer, Michael (2014), Spillovers in Networks of User Generated Content: Pseudo-Experimental Evidence on Wikipedia, ZEW Discussion Paper No. 14-132, Mannheim

Kummer, Michael and Patrick Schulte (2014), Money and Privacy – Android Market Evidence, ZEW Discussion Paper No. 14-131, Mannheim

Hackl, Franz, Michael Kummer, Rudolf Winter-Ebmer and Christine Zulehner (2013), Entry, Exit, and Pricing Strategies at Online Price-Comparison Sites, Do Price Markups Fall by Themselves, or Is Competition Crucial?, ZEW policy brief No. 13-02, Mannheim

Giorgidze, George, Torsten Grust, Iassen Halatchliyski and Michael Kummer (2013), Analysing the entire Wikipedia history with Database Supported Haskell, Tübingen.

Kummer, Michael (2013), Spillovers in Networks of User Generated Content – Evidence from 23 Natural Experiments on Wikipedia, ZEW Discussion Paper No. 13-098, Mannheim

Kummer, Michael, Marianne Saam, Iassen Halatchliyski and George Giorgidze (2012), Centrality and Content Creation in Networks – The Case of German Wikipedia, ZEW Discussion Paper No. 12-053, Mannheim

Hackl, Franz, Michael Kummer, Rudolf Winter-Ebmer and Christine Zulehner (2011), Market Structure and Market Performance in E-Commerce, ZEW Discussion Paper No. 11-084, Mannheim

Hackl, Franz, Michael Kummer and Rudolf Winter-Ebmer (2010), 99 Cent: Price Points in E-Commerce, ZEW Discussion Paper No. 10-022, Mannheim

11.2014: Zeitschrift "International Journal of Industrial Organization"

07.2014: Zeitschrift "Management Science"

03.2014: Zeitschrift "Information Systems Research"

07. – 07.2012 Regelmäßig in bestimmten Zeitabständen für einige Tage an der Universität. 12.12.2010 - 16.12.2010 Johannes Kepler University Linz, Austria

10.2010 – 01.2012 Regelmäßig in bestimmten Zeitabständen für einige Tage an der Universität. 12.12.2010 - 16.12.2010 Johannes Kepler University Linz, Austria