Current Research

Discussion Papers

Aligning Competition Policy and Industrial Policy in the EU (with Martin Peitz)

CEPR Discussion Paper 20807, 2025

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Public Communication and Collusion: New Screening Tools for Competition Authorities (with Carl Kreuzberg, Joseph Harrington, and Geza Sapi)

CEPR Discussion Paper 20490, 2025

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Returns to Data: Evidence from Web Tracking  (with Luis Aguiar, Jonas Hannane, Christian Peukert, and Hannes Ullrich)

CEPR Discussion Paper 19266 , 2024

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Assessing EU Merger Control through Compensating Efficiencies (with Pauline Affeldt, Klaus Gugler, and Joanna Piechucka)

CEPR Discussion Paper 16705, 2021

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Market Concentration in Europe: Evidence based on Antitrust Markets (with Pauline Affeldt, Klaus Gugler, and Joanna Piechucka)

CEPR Discussion Paper 15699, 2021

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EU Merger Control Database: 1990-2014 (with Pauline Affeldt and Florian Szücs)

DIW Data Documentation 95, 2018

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Correcting for Self-Selection Based Endogeneity in Management Research: A Review and Empirical Demonstration (with Joseph Clougherty)

DIW Discussion Paper, 1465, 2015 -- A different version of this papers has been accepted for publication in Organizational Research Methods

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Towards a Political Economy of Industrial Organization: Empirical Regularities from Deregulation, (with Lars-Hendrik Röller)

WZB Discussion Paper FS IV 01-17

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Endogenous Switching Costs and the Incentive for High Quality Entry

WZB Discussion Paper FS IV 99-29.

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Work in Progress

Public communication and Collusion: Measurement and Macroeconomic implications (with Carl Kreuzberg and Geza Sapi)

Productivity Spillovers from Large Investment Projects: Micro-Evidence for EU place-based industrial policy (with Theodor Friederiszick, and Jo Seldeslachts)

Consolidation through Exit: Evidence from the European Airline Industry (with Anatole Cheysson and Mattia Nardotto)

Effects of Competition Enforcement Along the Value Chain (with Chiara Criscuolo, Leonard le Roux and Antonis Tsiflis)

Effectiveness of Place-based Subsidies: Evidence from a Major EU State Aid Reform (with Joanna Piechucka and Jo Seldeslachts)

The Determinants of Value for Non-Merging Rival Firms (with Joseph Clougherty and Klaus Gugler)