This paper examines the interplay among bank liquidity creation (which incorporates all bank on- and off-balance sheet activities), monetary policy, and financial crises. We find that: (1) high liquidity creation (relative to trend) – particularly off-balance sheet liquidity creation – helps predict crises, controlling for other factors; (2) monetary policy has statistically significant, but economically minor effects on liquidity creation by small banks during normal times, and these effects are even weaker during financial crises; (3) monetary policy has very little effects on medium and large bank liquidity creation during both normal times and crises. These findings suggest that authorities may wish to monitor bank liquidity creation closely in order to predict and perhaps lessen the likelihood of financial crises. They might also consider other tools to control bank liquidity creation, such as capital and liquidity requirements.

We use novel monthly survey data from 1993 to 2012 on small business managerial perceptions of financial constraints and other conditions, matched with information on banks in their local markets. The data suggest that small banks have comparative advantages in alleviating these constraints. These advantages tend to be greater during adverse economic conditions and do not appear to decrease or increase secularly. Small banks also appear to have comparative advantages in providing liquidity insurance to small business customers of large banks experiencing liquidity shocks during financial crises. Our findings suggest a source of social costs from ongoing consolidation of the banking industry. Received December 28, 2015; editorial decision January 13, 2017 by Editor Philip Strahan.

We use novel monthly survey data from 1993 to 2012 on small business managerial perceptions of financial constraints and other conditions, matched with information on banks in their local markets. The data suggest that small banks have comparative advantages in alleviating these constraints. These advantages tend to be greater during adverse economic conditions and do not appear to decrease or increase secularly. Small banks also appear to have comparative advantages in providing liquidity insurance to small business customers of large banks experiencing liquidity shocks during financial crises. Our findings suggest a source of social costs from ongoing consolidation of the banking industry.