Current Research

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

CEPR Discussion Paper 20490, 2025

The Impact of Financial Support to Firms during Crises: The Case of Covid aid in the EU (with Giulia Canzian, Elena Crivellaro, Antonella Ferrara, Alessandro Sasso, and Stefano Verzillo)

CEPR Discussion Paper 20172, 2025

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

CEPR Discussion Paper 19266 , 2024

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

CEPR Discussion Paper 16705, 2021

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

CEPR Discussion Paper 15699, 2021

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

DIW Data Documentation 95, 2018

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

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

WZB Discussion Paper FS IV 01-17

Endogenous Switching Costs and the Incentive for High Quality Entry

WZB Discussion Paper FS IV 99-29.

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

Measuring Productivity Spillovers of Large Investment Projects (with Theodor Friederiszick, and Jo Seldeslachts)

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

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)

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