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Jahrbücher für Nationalökonomie und Statistik

Journal of Economics and Statistics

Editor-in-Chief: Winker, Peter

Ed. by Franz, Wolfgang / Riphahn, Regina / Smolny, Werner / Wagner, Joachim

IMPACT FACTOR increased in 2015: 0.258
5-year IMPACT FACTOR: 0.320

SCImago Journal Rank (SJR) 2015: 0.151
Source Normalized Impact per Paper (SNIP) 2015: 0.400
Impact per Publication (IPP) 2015: 0.250

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Banking Overleveraging and Macro Instability: A Model and VSTAR Estimations

Frauke Schleer2 / 1

1Henry Arnhold Professor of Economics, New School for Social Research, 79 Fifth Ave., New York, NY 10003, USA, ZEW Research Associate, and Currently Visitor at the European Central Bank, Frankfurt am Main, Germany

2Centre for European Economic Research (ZEW), Germany

Citation Information: Jahrbücher für Nationalökonomie und Statistik. Volume 236, Issue 6, Pages 609–638, ISSN (Online) 2366-049X, ISSN (Print) 0021-4027, DOI: https://doi.org/10.1515/jbnst-2015-1042, December 2016

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Overleveraging of the banking sector has been considered one of the main causes of the 2007–09 financial crisis and the subsequent great recession. It was also of major concern for the subsequent BIS regulatory policies resulting in Basel III and its request for higher capital requirements. It has now become highly relevant for the planned European banking union. Overleveraging of the banking sector exposes the financial sector and the macroeconomy to vulnerabilities, but also, as critics state, seems to constrain credit flows to the private sector. We present here a measure of overleveraging, defined as the difference between actual and sustainable debt, conduct an empirical study on overleveraging for 40 banks in Europe, and study the vulnerabilities and credit contractions that can arise subsequently. Before the year 2004 overleveraging had not been a serious problem as leverage was on a sustainable level. However, in the run-up to the financial crisis, actual and optimal debt spread apart and the banking sector began to suffer from overleveraging. We use a non-linear Vector STAR model to evaluate the hypothesis that periods of increasing debt levels are accompanied by more severe credit constraints than periods of low leveraging. We demonstrate this for country groups across Europe.

Keywords: overleveraging; banking sector; vector STAR; real economy; credit flows; regime switch

JEL Classification: C61; E32; G01

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