The Effects of Antitrust Laws on Horizontal Mergers: International Evidence
Chune Young Chung, Iftekhar Hasan, JiHoon Hwang, Incheol Kim
Journal of Financial and Quantitative Analysis,
No. 7,
2024
Abstract
This study examines how antitrust law adoptions affect horizontal merger and acquisition (M&A) outcomes. Using the staggered introduction of competition laws in 20 countries, we find antitrust regulation decreases acquirers’ five-day cumulative abnormal returns surrounding horizontal merger announcements. A decrease in deal value, target book assets, and industry peers' announcement returns are consistent with the market power hypothesis. Exploiting antitrust law adoptions addresses a downward bias to an estimated effect of antitrust enforcement (Baker (2003)). The potential bias from heterogeneous treatment effects does not nullify our results. Overall, antitrust policies seem to deter post-merger monopolistic gains, potentially improving customer welfare.
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14 Euro Mindestlohn: Rund ein Fünftel der Betriebe erwartet einen Beschäftigungsrückgang
Erik-Benjamin Börschlein, André Diegmann
IAB Forum,
October
2024
Abstract
Auf die Erhöhung des Mindestlohns auf 12 Euro im Oktober 2022 haben rund 30 Prozent der Betriebe in Deutschland mit Lohnerhöhungen reagiert. Eine weitere Anhebung des Mindestlohns auf 14 Euro könnte mehr als jeden zweiten Betrieb betreffen. Etwa ein Drittel der Betriebe, die direkt davon betroffen wären, geht davon aus, innerhalb der kommenden zwölf Monate Beschäftigung abbauen zu müssen.
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From Shares to Machines: How Common Ownership Drives Automation
Joseph Emmens, Dennis Hutschenreiter, Stefano Manfredonia, Felix Noth, Tommaso Santini
IWH Discussion Papers,
No. 23,
2024
Abstract
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Alumni
IWH Alumni The IWH maintains contact with its former employees worldwide. We involve our alumni in our work and keep them informed, for example, with a newsletter. We also plan…
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Media Response
Media Response August 2025 Oliver Holtemöller: Die dunkle Seite des Schuldenmachens in: Berliner Zeitung, 22.08.2025 IWH: Investition und Insolvenz in: Berliner Zeitung,…
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Homepage
20 years after Katrina: How the new start succeeded In the summer of 2005, Katrina and other hurricanes caused one of the worst natural disasters in the history of the USA. The…
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Worker Beliefs about Outside Options
Simon Jäger, Christopher Roth, Nina Roussille, Benjamin Schoefer
Quarterly Journal of Economics,
No. 3,
2024
Abstract
Standard labor market models assume that workers hold accurate beliefs about the external wage distribution, and hence their outside options with other employers. We test this assumption by comparing German workers’ beliefs about outside options with objective benchmarks. First, we find that workers wrongly anchor their beliefs about outside options on their current wage: workers that would experience a 10% wage change if switching to their outside option only expect a 1% change. Second, workers in low-paying firms underestimate wages elsewhere. Third, in response to information about the wages of similar workers, respondents correct their beliefs about their outside options and change their job search and wage negotiation intentions. Finally, we analyze the consequences of anchoring in a simple equilibrium model. In the model, anchored beliefs keep overly pessimistic workers stuck in low-wage jobs, which gives rise to monopsony power and labor market segmentation.
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Archive
Media Response Archive 2021 2020 2019 2018 2017 2016 December 2021 IWH: Ausblick auf Wirtschaftsjahr 2022 in Sachsen mit Bezug auf IWH-Prognose zu Ostdeutschland: "Warum Sachsens…
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The Mannheim Enterprise Panel linked to the Establishment History Panel of the IAB 2010–2020 (MUP-BHP 1020)
André Diegmann, Sandra Gottschalk, Mirja Hälbig, Alexandra Schmucker, Stefanie Wolter
FDZ Datenreport,
2024
Abstract
The Mannheim Enterprise Panel linked to the Establishment History Panel (MUP-BHP) is made up of cross-sectional data sets from 2010 onwards. Each cross-section includes all limited liability companies (GmbH) from the Mannheim Company Panel (MUP) and their permanent establishments throughout Germany that are recorded in the Establishment History Panel (BHP) (BeH) as of 31.12. This linking of establishments and businesses is based on a record linkage of the address data of the MUP held by the Leibniz Centre for European Economic Research and the business address data at the IAB. The individual cross-sectional data sets contain information on the establishments and companies as well as an additional file on shareholders. The data sets can be linked to form a panel. This data report describes the Mannheim Enterprise Panel linked to the Establishment History Panel (MUP-BHP) 2010-2020.
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People
People Doctoral Students PhD Representatives Alumni Supervisors Lecturers Coordinators Doctoral Students Afroza Alam (Supervisor: Reint Gropp ) Annika Backes (Supervisors: Simon…
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