What the study found
The study found that ESG controversies are linked to lower cost efficiency in banks because they increase non-interest expenses. The results also suggest that the size of this cost effect varies with institutional context and with a bank's prior ESG performance.
Why the authors say this matters
The authors conclude that ESG failures carry measurable financial consequences for banks. The study suggests that institutional quality, digital engagement, and baseline ESG performance shape how banks manage ESG-related reputational shocks.
What the researchers tested
The researchers analyzed data from the world's largest banks and used stochastic frontier analysis, a method for estimating how far actual costs are from a cost-efficient frontier. They examined how ESG controversies, institutional context, baseline ESG performance, and digital visibility measured by Google Search Volume relate to operating costs.
What worked and what didn't
ESG controversies were associated with significantly higher non-interest expenses and lower cost efficiency. Banks in the European Union or in countries with strong rule of law and regulatory quality experienced smaller cost increases after controversies, while banks in highly effective government structures faced stronger cost pressures. Higher baseline ESG performance improved cost efficiency and appeared to act as reputational insurance, and greater digital visibility was associated with marginally higher operating costs but helped ESG reputation recovery.
What to keep in mind
The abstract does not provide detailed limitations beyond the scope of the bank sample and the variables studied. The findings are based on the world's largest banks, so the summary does not state how far they apply outside that group.
Key points
- ESG controversies were linked to lower cost efficiency in banks.
- The main cost channel was higher non-interest expenses.
- Institutional context changed the size of the cost increase after controversies.
- Higher baseline ESG performance reduced the negative impact of controversies.
- Greater digital visibility was tied to slightly higher operating costs but better reputation recovery.
Disclosure
- Research title:
- ESG controversies raise bank operating costs
- Authors:
- Emilia Klepczarek, Agata Wieczorek, Wiktor Wojciechowski
- Institutions:
- SGH Warsaw School of Economics, University of Humanities and Economics in Lodz, University of Humanities and Economics in Lodz, University of Łódź, University of Łódź
- Publication date:
- 2026-03-08
- DOI:
- 10.1002/csr.70542
- OpenAlex record:
- View
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