25 Jahre IWH

Professor Dr. Andre Guettler

Professor Dr. Andre Guettler
Aktuelle Position

seit 6/16


Leibniz-Insitut für Wirtschaftsforschung Halle (IWH)

seit 4/13

Direktor des Instituts für Strategische Unternehmensführung und Finanzierung

Universität Ulm


  • reale Effekte von Finanzmarktregulation
  • Kreditzugang für kleine und mittlere Unternehmen

Andre Guettler leitet das Institut für Strategische Unternehmensführung und Finanzierung an der Universität Ulm. Seine Forschung konzentriert sich auf Fragestellungen der Finanzintermediation, hierbei vor allem auf die realen Effekte von Finanzmarktregulation, Wettbewerb zwischen Banken, Zugang zu Krediten und Ratingagenturen.

Er hat Forschungsaufenthalte an der National University of Singapore, der University of Texas at Austin, der Tilburg University und der Coppead Business School absolviert. Er promovierte in Betriebswirtschaftslehre an der Goethe-Universität Frankfurt am Main im Jahr 2005.

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Professor Dr. Andre Guettler
Professor Dr. Andre Guettler
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The Impact of Public Guarantees on Bank Risk-Taking: Evidence from a Natural Experiment

Reint E. Gropp C. Gruendl Andre Guettler

in: Review of Finance , Nr. 2, 2014


In 2001, government guarantees for savings banks in Germany were removed following a lawsuit. We use this natural experiment to examine the effect of government guarantees on bank risk-taking. The results suggest that banks whose government guarantee was removed reduced credit risk by cutting off the riskiest borrowers from credit. Using a difference-in-differences approach we show that none of these effects are present in a control group of German banks to whom the guarantee was not applicable. Furthermore, savings banks adjusted their liabilities away from risk-sensitive debt instruments after the removal of the guarantee, while we do not observe this for the control group. We also document that yield spreads of savings banks’ bonds increased significantly right after the announcement of the decision to remove guarantees, while the yield spread of a sample of bonds issued by the control group remained unchanged. The evidence implies that public guarantees may be associated with substantial moral hazard effects.

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European versus Anglo-Saxon Credit View: Evidence from the Eurozone Sovereign Debt Crisis

Marc Altdörfer Carlos A. De las Salas Vega Andre Guettler Gunter Löffler

in: IWH-Diskussionspapiere , Nr. 34, 2016


We analyse whether different levels of country ties to Europe among the rating agencies Moody’s, S&P, and Fitch affect the assignment of sovereign credit ratings, using the Eurozone sovereign debt crisis of 2009-2012 as a natural laboratory. We find that Fitch, the rating agency among the “Big Three” with significantly stronger ties to Europe compared to its two more US-tied peers, assigned on average more favourable ratings to Eurozone issuers during the crisis. However, Fitch’s better ratings for Eurozone issuers seem to be neglected by investors as they rather follow the rating actions of Moody’s and S&P. Our results thus doubt the often proposed need for an independent European credit rating agency.

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Financial Incentives and Loan Officer Behavior: Multitasking and Allocation of Effort Under an Incomplete Contract

P. Behr A. H. Drexler Reint E. Gropp Andre Guettler

in: SAFE Working Paper Series, No. 62 , Nr. 62, 2014


In this paper we investigate the implications of providing loan officers with a compensation structure that rewards loan volume and penalizes poor performance versus a fixed wage unrelated to performance. We study detailed transaction information for more than 45,000 loans issued by 240 loan officers of a large commercial bank in Europe. We examine the three main activities that loan officers perform: monitoring, originating, and screening. We find that when the performance of their portfolio deteriorates, loan officers increase their effort to monitor existing borrowers, reduce loan origination, and approve a higher fraction of loan applications. These loans, however, are of above-average quality. Consistent with the theoretical literature on multitasking in incomplete contracts, we show that loan officers neglect activities that are not directly rewarded under the contract, but are in the interest of the bank. In addition, while the response by loan officers constitutes a rational response to a time allocation problem, their reaction to incentives appears myopic in other dimensions.

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Public Bank Guarantees and Allocative Efficiency

Reint E. Gropp Andre Guettler Vahid Saadi

in: IWH-Diskussionspapiere , Nr. 7, 2015


In the wake of the recent financial crisis, many governments extended public guarantees to banks. We take advantage of a natural experiment, in which long-standing public guarantees were removed for a set of German banks following a lawsuit, to identify the real effects of these guarantees on the allocation of credit (“allocative efficiency”). Using matched bank/firm data, we find that public guarantees reduce allocative efficiency. With guarantees in place, poorly performing firms invest more and maintain higher rates of sales growth. Moreover, firms produce less efficiently in the presence of public guarantees. Consistently, we show that guarantees reduce the likelihood that firms exit the market. These findings suggest that public guarantees hinder restructuring activities and prevent resources to flow to the most productive uses.

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