The Reverse Revolving Door in the Supervision of European Banks
Stefano Colonnello, Michael Koetter, Alex Sclip, Konstantin Wagner
International Journal of Central Banking,
forthcoming
Abstract
We assemble data about executives on the boards of national supervisory authorities (NSA) in European banking, which reveal that 40% have an employment history in the financial industry. Appointment patterns to NSA boards differ substantially across countries. Generally, the appointment of former finance professionals as prudential supervisors is inconsequential for banks‘ valuations, capitalization, and asset growth. The exception are positive, but short-lived valuation effects for those banks whose alumni are appointed as executives of directly responsible NSA boards. Circumstantial evidence suggests that a “proximity bias“ is a more likely driver of this effect inste
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The Single Supervisory Mechanism, Loan Growth vs. Volatility, and Granular Risk Spillovers
Helena Baum, Melina Ludolph, Lena Tonzer
RSC Working Paper,
No. 17,
2026
Abstract
We analyze how the establishment of the Single Supervisory Mechanism (SSM) relates to patterns in banks’ lending activities, risk outcomes, and granular risks within the banking system. Using data on euro area banks from 2010 to 2021, we estimate idiosyncratic shocks to banks’ loan growth to construct a measure of loan growth volatility and to compute the “Banking Granular Residual.” Banks under SSM supervision exhibit lower volatility in loan portfolio growth, indicating more stable lending dynamics. Furthermore, the implementation of the SSM is associated with positive spillover effects on non-SSM banks’ lending and a weaker relationship between granular banking shocks and economic growth.
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Common Ownership, Tacit Know-How, and the Market for Technology
Dennis Hutschenreiter
IWH Discussion Papers,
No. 3,
2026
Abstract
Firms increasingly rely on markets for technology to acquire innovations developed outside their boundaries, yet acquiring intellectual property rights alone often does not guarantee successful implementation. Many technologies depend on tacit know-how that must be supplied by the provider after the transaction is completed. This paper examines whether common ownership between a technology provider and a potential adopter mitigates this implementation problem. I develop a model in which overlapping institutional investors cause the provider to partially internalize the adopter’s gains from successful implementation, strengthening incentives to transfer tacit know-how. This mechanism operates only when know-how is unverifiable – absent this friction, common ownership leaves matching and outcomes unchanged. Under moral hazard, the model predicts that common ownership increases the likelihood of technology transfer to a given adopter, that this effect is stronger when tacit know-how is more important, and that common ownership improves post-transfer outcomes conditional on adoption. I test these predictions using U.S. patent reassignments between publicly traded firms. Using within-deal variation across competing potential adopters and plausibly exogenous variation from passive index-fund holdings, I show that common ownership increases the likelihood that a firm acquires a technology, particularly when the transferred bundle is more tacit. Common ownership predicts stronger subsequent innovation and higher future firm value, especially when ownership overlap is concentrated among investors with stronger incentives to monitor the provider. These findings show how ownership structure shapes interfirm technology transfer by affecting not only who acquires a technology, but also how much value is created.
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Climate-Related Disclosure Commitment of the Lenders, Credit Rationing, and Borrower Environmental Performance
Iftekhar Hasan, Haekwon Lee, Buhui Qiu, Anthony Saunders
Review of Accounting Studies,
Vol. 31 (1),
2026
Abstract
Using lenders who become members of the Task Force on Climate-Related Financial Disclosures (TCFD) as an exogenous shock, we examine whether and how lenders’ commitment to transparent climate-related disclosures affects borrowers’ environmental performance. We find that borrowers of TCFD-member lenders, relative to control firms, significantly improve their environmental performance after the TCFD launch. Lenders’ disclosure commitments influence borrowers through credit rationing and monitoring. Specifically, polluting borrowers face higher borrowing costs, reduced access to credit, and greater incorporation of environmental action covenants in loan agreements. Additionally, polluting borrowers of TCFD-member lenders experience heightened financial constraints. Finally, borrowers of TCFD-member lenders are more likely to adopt the TCFD framework for climate-related disclosure after the TCFD establishment. Together, these findings illuminate the role of lenders in driving corporate environmental performance improvement through their commitment to transparent climate-related disclosures.
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A Rear-mirror View to the 11th FIN-FIRE “Challenges to Financial Stability” Workshop
Erik Ködel, Michael Koetter
Wirtschaft im Wandel,
No. 3,
2025
Abstract
On September 25th, financial economists from all over the world travelled for the 11th time to Halle (Saale) to attend the annual FIN-FIRE Workshop at IWH. During two days, authors of ten papers covered a comprehensive overview of contemporary issues that pose potential challenges to the financial system, including data privacy in mortgage markets, climate risks in bond markets, synthetic risk transfers, the effects of geopolitical risks for lending, as well as granular perspectives on the transmission of monetary policy. An intense exchange of thoughts between authors, discussants, and the audience yielded genuinely new insights into the resilience and fragility of financial systems.
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10th Vintage
The CompNet 10th Vintage Dataset 10th Vintage dataset is now available! The CompNet dataset provides a comprehensive set of micro-aggregated indicators, specifically designed to…
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Research Articles
Research Articles Explore cutting-edge research based on CompNet’s micro-aggregated firm-level data and related analytical tools. These articles cover empirical and theoretical…
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Vocational Training
Vocational Training at IWH At the Halle Institute for Economic Research (IWH) the state-approved professions specialist in media and information services (m/f/x) [library] ,…
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Macroeconomic Reports
Macroeconomic Reports Local and global: IWH regularly provides current economic data – be it about the state of the East German economy, the macroeconomic development in Germany…
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Diversity
Diversity We have signed the Diversity Charter and actively commit to a culture of diversity. IWH stands for a working environment that is free of biases and barrier-free: A…
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