I am an Assistant Professor of Accounting at London Business School. My CV is here.
My research examines information and measurement issues in sustainable finance and financial intermediation. I use empirical archival and field experimental methods to understand how accounting information and its regulation can help (or hinder) efforts to address sustainability challenges and financial stability concerns. In ongoing work, I particularly explore the measurement, determinants and consequences of corporate externalities.
Prior to joining London Business School, I pursued my doctoral studies in Accounting at the University of Mannheim with a visiting stay at the University of Chicago Booth School of Business during the 2023/2024 academic year. I hold a MPhil in Finance from the University of Cambridge as well as a M.Sc. and B.Sc. from the University of Mannheim.
Working Papers
The Role of ESG Narratives and Mandatory ESG Fund Disclosure in Sustainable Investing
Solo-Authored Job Market Paper
Investors have long been told that ESG investments outperform financially. I study the implications of this narrative and its interaction with mandatory ESG fund disclosure. Using novel data on private impact funds and ESG fund marketing, I find that funds claiming a positive link between ESG and financial returns dominate, absent widespread mandatory disclosure. These funds generally meet their return targets, but underdeliver on real impact. Mandatory ESG fund disclosure and related enforcement shift the prevailing ESG narrative. Asset managers are more likely to adopt an impact-focused narrative, make underlying portfolio changes that reflect this shift, and, in doing so, attract more capital. A field experiment in collaboration with the largest German investor association reveals the underlying mechanism. Without mandatory disclosure labels, investors adjust their return expectations, but not their impact expectations to the ESG narrative conveyed because they do not trust funds’ impact claims. Hence, narratives of ESG paying off crowd out impact-focused ones. Mandatory disclosure labels that classify funds depending on ESG focus achieve separation between funds based on the impact investors expect, thereby restoring some demand for impact-focused strategies.
Forward-Looking Credit Loss Recognition and Banks' Internal Risk Models:
Timeliness, Reporting Bias, and Lending Effects
with Jannis Bischof, Rainer Haselmann and Oliver Schlüter
The global adoption of IFRS 9 requires banks to recognize loan loss provisions based on forward-looking credit loss estimates. While these rules increase the timeliness of loss recognition and, thus, the cost of high-risk lending, they also expand the scope for managerial discretion in loss estimation. Using supervisory loan-level data on German banks' internal rating models, we examine how banks respond to these countervailing incentives. Relative to unaffected banks, IFRS 9 adopters update their internal credit risk estimates more frequently but assign more favorable internal ratings to otherwise identical borrowers. A lower precision of these ratings accompanies this pattern, consistent with the strategic use of increased reporting discretion. The implications for bank lending are twofold. First, to counter the increased cost of high-risk lending, banks reduce credit to borrowers most likely to experience internal rating downgrades that would trigger additional provisions in future periods. These effects cluster around seemingly arbitrary provisioning thresholds but also extend broadly across the whole non-investment-grade region, indicating a general shift toward lower credit risk in banks' loan portfolios. Second, the increased bias in loss estimates is associated with higher rollover rates for precisely those loans where expected credit losses are underreported, suggesting that expanded reporting discretion distorts lending in a way that optimizes model input rather than portfolio risk.
Corporate Emissions and Profits
with Marianne Bertrand and Christian Leuz
Work in Progress
Real Effects of Forward-Looking Loss Recognition in Bank Accounting
with Jannis Bischof, Rainer Haselmann and Clemens Lauer
University of Mannheim Business School
Lecturer for IFRS Reporting (M.Sc., Exercise Sessions)
Since Fall 2024
Avg. 90 Students | Teaching Evaluation: 1.2/5.0 (1.0 = best)
Supervision of Bachelor, Seminar and Master Theses
Since Fall 2020
>25 Supervisions | Teaching Evaluation: 1.2/5.0 (1.0 = best)
Lecturer for Financial Accounting I (B.Sc., Exercise Sessions)
Fall 2020 - 2022
Avg. 400 Students | Teaching Evaluation: 1.8/5.0 (1.0 = best)
Teaching Assistant for Case Studies on IFRS Reporting (Post-Experience M.Sc.)
Summer 2025
Teaching Evaluations – Excerpts