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AbstractGovernment interventions into the financial system in the form of bail out operations or liquidity assistance are often justified with the systemic importance of large banks for the real economy. In this paper, we test whether idiosyncratic shocks to loan growth at large banks have effects on real GDP growth. We employ a measure of idiosyncratic shocks which follows Gabaix (2009). He shows that idiosyncratic shocks at large firms have an impact on GDP growth in the US. We apply this idea to the banking sector. We find evidence that changes in lending by large banks have a significant impact on GDP growth. This effect is mostly driven by episodes of negative loan growth rates and by the Eastern European countries in our sample.
a b s t r a c tSize matters in banking. In this paper, we explore whether shocks originating at large banks affect the probability of distress of smaller banks and thus the stability of the banking system. Our analysis proceeds in two steps. In a first step, we follow Gabaix [Gabaix, X., 2008a. The Granular Origins of Aggregate Fluctuations. Available at SSRN: http://ssrn.com/abstract=1111765] and construct a measure of idiosyncratic shocks at large banks, the so-called Banking Granular Residual. This measure documents the importance of size effects for the German banking system. In a second step, we incorporate this measure of idiosyncratic shocks at large banks into an integrated stress-testing model for the German banking system following De Graeve et al. (2008). We find that positive shocks at large banks reduce the probability of distress of small banks.
How do financial market conditions affect real economic performance? Empirical investigations of this question have often relied on measures of external financial dependence (EFD) that are constructed using US data and applied to other countries under the assumption of a stable industry ranking across countries. This paper exploits unique, comparable survey data from seven European countries to show that correlations of EFD across countries are weak, casting some doubt on this assumption. We then use the novel survey-based EFD index to show that the global financial crisis had a disproportionately negative impact on the real performance of financially dependent firms. Further investigations highlight the importance of supply chains in propagating the credit shock.
We analyze the determinants of coverage ratios and their components (NPLs and loss loan reserves) in a large sample of European banks. We find that bank-specific factors, particularly credit risk variables (including forward-looking indicators) and capitalization, matter the most. Coverage ratios adjust insufficiently as asset quality deteriorates, except in high-NPL banks. Capitalization has a positive effect on coverage ratio, pointing to a complementarity between the two buffers. At the country level, specific macroprudential levers and developing NPL secondary markets enhance coverage ratios. Our findings emphasize the importance of micro oversight and call for more stringent macro policies in high-NPL countries.
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