Ongoing Research Projects
Ongoing Research Projects
(with Carlos Carrillo-Tudela and Leo Kaas)
Presented at the NBER Summer Institute, Barcelona Summer Forum, Dale T. Mortensen Conference, 12th ifo Conference on Macroeconomics and Survey Data, EEA/ESEM, MacCaLM Summer Workshop, Bavarian Macro Day, Seminars at the University of Essex, Frankfurt, Erlangen-Nürnberg, VfS, and the Universidad Diego Portales;
(Discussion Paper: Most recent WP, IZA WP, CESifo WP, IAB DP) (Media Coverage: VoxEU)
Abstract
Firms and workers predominately match via job postings, networks of personal contacts or the public employment agency, all of which help to ameliorate labor market frictions. In this paper we investigate the extent to which these search channels have differential effects on labor market outcomes. Using novel linked survey-administrative data we document that (i) low-wage firms and low-wage workers are more likely to match via networks or the public agency, while high-wage firms and high-wage workers succeed more often via job postings; (ii) job postings help firms the most in poaching and attracting high-wage workers and help workers the most in climbing the job ladder. To evaluate the implications of these findings for employment, wages and labor market sorting, we structurally estimate an equilibrium job ladder model featuring two-sided heterogeneity, multiple search channels and endogenous recruitment effort. The estimation reveals that networks are the most cost-effective channel, allowing firms to hire quickly, yet attracting workers of lower average ability. Job postings are the most costly channel, facilitate hiring workers of higher ability, and matter most for worker-firm sorting. Although the public employment agency provides the lowest hiring probability, its removal has sizeable consequences, with aggregate employment declining by at least 1.4 percent and rising bottom wage inequality.
(with Daniel Bias, Chen Lin, and Thomas Schmid)
(New Draft in Preparation)
Presented at the EFA Annual Meeting, Dale T. Mortensen Conference, EEA/ESEM, T2M, Asia-Pacific Corporate Finance Workshop, Perspectives on (Un-)Employment, Seminars at the University of Konstanz, University of Erlangen-Nürnberg, and Stockholm School of Economics
(with Paulo Calvo, Ilse Lindenlaub, Ana Reynoso, and Lindsey Uniat)
(Draft in Preparation)
(with Cesar Barreto, Antoine Bertheau, Dogan Gülümser, Alexander Hijzen, Astrid Kunze, Marta Lachowska, Salvatore Lattanzio, Stefano Lombardi, Jordy Meekes, and Balazs Murakozy, Marco G. Palladino, Oskar Skans)
(Draft in Preparation)
(with César Barreto, Patrick Bennett, Antoine Bertheau, Winnie Chan, Jonas Fluchtmann, Andrei Gorshkov, Jonathan Hambur, Alexander Hijzen, Nick Johnstone, Stefano Lombardi, Jordy Meekes, Tahsin Mehdi, Balázs Muraközy, Gulnara Nolan, Kjell Salvanes, Oskar Nordström Skans, Rune Vejlin)
(Draft in Preparation)
13) Going Public and the Internal Organization of the Firm (with Daniel Bias, Stefan Obernberger, Merih Sevilir)
forthcoming in the Journal of Finance (Link to WP)
12) Gender-Specific Application Behaviour, Matching, and the Residual Earnings Gap (with Christian Merkl)
published in 2025 in the Economic Journal, (Link)
11) Firm Productivity, Wages, and Sorting (with Bastian Schulz)
published in 2024 in the Journal of Labor Economics, (Link) (Link to Online-Appendix)
10) Employment Protection in Dual Labor Markets: Any Amplification of Macroeconomic Shocks?
published in 2023 in the B.E. Journal of Macroeconomics (Link)
9) AKM effects for German labour market data for 1985-2021 (with Stefan Seth and Stefanie Wolter)
published in 2023 in the Journal of Economics and Statistics (Link)
8) IABSE-ADIAB – IAB Job Vacancy Survey data linked to administrative data
published in 2023 in the Journal of Economics and Statistics (Link)
7) Do Minimum Wages Improve Self-Rated Health? Evidence from a Natural Experiment (with Lucas Hafner)
published in 2022 in Empirical Economics, online first (Link)
6) Does Online Search Improve the Match Quality of New Hires? (with Nicole Gürtzgen, Laura Pohlan, and Gerard van den Berg)
published in 2021 in Labour Economics, Vol 70 (Link)
5) Recruiting Intensity and Hiring Practices: Cross-Sectional and Time-Series Evidence (with Christian Merkl, Heiko Stüber, and Nicole Gürtzgen)
published in 2021 in Labour Economics, Vol 68 (Link)
4) History Dependence in Wages and Cyclical Selection: Evidence from Germany (with Anja Bauer)
published in 2020 in Labour Economics, Vol 67. (Link)
3) Decomposing the Large Firm Wage Premium in Germany (with Stefan Seth and Stefanie Wolter)
published in 2020 in Economics Letters, Vol. 194 (Link)
2) The IAB Job Vacancy Survey – Design and Research Potential (with Mario Bossler, Nicole Gürtzgen, Alexander Kubis, and Benjamin Küfner)
published in 2020 in the Journal of Labour Market Research Vol. 54 (Link)
1) The German minimum wage: effects on productivity, profitability, and investments (with Mario Bossler, Nicole Gürtzgen, Ute Betzl, and Lisa Feist)
published in 2020 in Journal of Economics and Statistics, Vol. 240, 2/3 (Link)
9) AKM effects for German labour market data 1985-2023 (with Stefanie Wolter)
FDZ-Methodenreport 03/2025 (Link)
8) AKM effects for German labour market data 1985-2021 (with Stefan Seth and Stefanie Wolter)
FDZ-Methodenreport, 1/2023 (Link)
7) IAB-Stellenerhebung verknüpft mit administrativen Daten des IAB (IABSE-ADIAB): – Version 7520 v1, Forschungsdatenzentrum der Bundesagentur für Arbeit (BA) im Institut für Arbeitsmarkt- und Berufsforschung (IAB) (with Tobias Graf, Stephan Grießemer, Markus Köhler, Martina Oertel, and Andreas Schneider)
6) IAB-Stellenerhebung verknüpft mit administrativen Daten des IAB (IABSE-ADIAB) 1975-2020.
FDZ-Datenreport, 01/2023(de) (Link)
5) IAB Vacancy Survey linked to administrative data of the IAB (IABSE-ADIAB) 1975-2020.
FDZ-Datenreport, 01/2023(en) (Link)
4) "Identifying Couples in Administrative Data" for the years 2001-2014 (with Ann-Christin Bächmann, Corinna Frodermann, Michael Oberfichtner, and Simon Trenkle)
FDZ-Datenreport, 03/2021 (Link)
3) The Administrative Wage and Labor Market Flow Panel Extension for the IAB Job Vacancy Survey 2010–2014 (with Heiko Stüber and Stefan Seth)
FDZ-Datenreport, 08/2020 (Link)
2) AKM effects for German labour market data (with Lisa Bellmann, Stefan Seth, and Stefanie Wolter)
FDZ-Methodenreport, 01/2020 (Link)
1) A simple algorithm to link „last hires“ from the Job Vacancy Survey to administrative records.
FDZ-Methodenreport, 06/2019) (Link)
3) IAB-Prognose 2025: Zwischen Schwächephase und Investitionsimpulsen (with Hermann Gartner, Timon Hellwagner, Markus Hummel, Christian Hutter, Susanne Wanger, Enzo Weber, and Gerd Zika).
IAB-Kurzbericht 2025/03, Institut für Arbeitsmarkt- und Berufsforschung (IAB), Nürnberg. (Link)
2) Wie Männer und Frauen sich bei der Jobsuche unterscheiden: Bewerbungsverhalten kann die Hälfte der bereinigten Verdienstlücke erklären (with Christian Merkl)
IAB-Kurzbericht 2023/08, Institut für Arbeitsmarkt- und Berufsforschung (IAB), Nürnberg. (Link)
1) Auswirkungen des gesetzlichen Mindestlohns auf Betriebe und Unternehmen (with Mario Bossler, Nicole Gürtzgen, Ute Betzl, Feist and Jan Wegmann)
IAB-Forschungsbericht 04/2018 (Link)