We explore the inter-temporal effects of the pool externalities caused by imperfect screening in competitive credit markets. We find that imperfect screening may, depending on the parameters of the model, generate excessive screening, inefficient duplication of screening or screening cycles. Whenever screening cycles occur they are manifestations of either socially excessive or insufficient screening. We present a full equilibrium characterization and a welfare analysis. The implementation of socially optimal lending decisions requires communication across lenders (i.e. information sharing), which decentralized markets typically cannot achieve.

This paper analyses the evolution of the safety and soundness of the European banking sector during the various stages of the Basel process of capital regulation. We document the evolution of various measures of systemic risk as the Basel process unfolds. Most strikingly we find that the exposure to systemic risk as measured by SRISK has been steeply rising for the highest quintile, moderately rising for the second quintile, and remaining roughly stationary for the remaining three quintiles of listed European banks. This observation suggests that during the Basel process, systemic risk has been contained for the majority of European banks, but not for the largest and riskiest institutions. When analyzing the sources of systemic risk we find compelling evidence that the increase in exposure to systemic risk (SRISK) is tied to the implementation of internal models for determining credit risk, as well as market risk. Based on this evidence, the sub-prime crisis found especially the largest and more systemic banks ill-prepared and lacking resiliency. This condition has been aggravated during the European sovereign crisis. The Banking Union has not restored aggregate resiliency to pre-crisis levels. Finally, low-interest rates considerably affect the contribution to systemic risk, particularly for the riskier banks.

We find strong evidence that measures of social responsibility contribute to increasing the resilience of banks. This finding holds when social responsibility is measured by aggregated ESG scores provided by Thomson Reuters, both according to their older Asset 4 categorization and to the reformed ESG Refinitiv classification, and resilience is proxied by various measures of systemic and systematic risk. The results hold on the level of subcategories of the ESG pillars, where we find that, particularly, variables related to the long-term perspective enhance resilience. Moreover, in our international study, we find significant transatlantic differences.