“When Private Information Settles the Bill: Money and Privacy in Google’s Market for Smartphone Applications”, with Patrick Schulte (ZEW), 2017 (R\&R at Management Science, available as ZEW Discussion Paper 14-131., 2014 abstract cf. below)
“IT Outsourcing and Firm Productivity: Eliminating Bias from Selective Missingness in the Dependent Variable,” with C. Breunig (HU Berlin), J. Ohnemus (ZEW, Mannheim) and S. Viete (ZEW, Mannheim), 2017 (under submission; available as ZEW Discussion Paper No. 16-092)
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“Attention in the Peer Production of User Generated Content,” 2017“Economic Downturn and Volunteering: Do Economic Crises Affect Content Generation on Wikipedia?” with Olga Slivko (ZEW) and Michael X. Zhang (HKUST), 2017 (available as ZEW Discussion Paper No. 15-078)
“Does Wikipedia matter?”, with M. Hinnosaar (C. Carlo Alberto), T. Hinnosaar (C. Carlo Alberto) and O. Slivko (ZEW, Mannheim), 2017, available as ZEW Discussion Paper No. 15-089
“User Data, Market Power and Innovation in Online Markets – Evidence from the Mobile App Industry,” with Patrick Schulte (ZEW, Mannheim) und Reinhold Kesler (ZEW, Mannheim), 2017 (nominated for DRUID Best Paper Award)
“Mobile Applications and Access to Private Data – The Supply Side of the Android Ecosystem,” with Patrick Schulte (ZEW, Mannheim) und Reinhold Kesler (ZEW, Mannheim), 2017
“Healthy Ecosystems for Online Reviews,” with Uli Laitenberger (ZEW, Mannheim) and Erin Strumpf (McGill)
“Geographical Price Discrimination in Online Markets – Evidence from Russia (with O. Slivko and I Yamtchikov, 2013)”
“Customer Reviews as Public Information Good in Online Markets” (with F. Hackl), 2010
“Market Entry in E-Commerce” NET Institute Working Paper No. 08-23, with Maximilian Kasy (U. Harvard), 2008