External Financing Costs and Banks Loan Supply: Does the Structure of the Bank Sector Matter?
This paper investigates whether banks loan supply depend on internally generated capital in a fashion that varies according to the size-structure of the bank sector. Banks may experience liquidity constraints if it is costly to raise uninsured funds and recent evidence suggests that external financing costs may be particularly high for small banks. Considering that retail loan markets are predominately local in nature, this paper ask whether the potential significance of individual-bank constraints carry over to a regional level in a manner that affects the overall supply of bank credit to local loan markets. Panel data for US states is used to study how state-level loan supply covaries with cash flow in bank systems with different size-structure. Shifts in the demand for loans induced by the Tax Reform Act of 1986 is used to identify loan supply. The results produce strong evidence of state-level supply effects. It is shown that loan supply of bank systems with a high percentage of small banks depends pro-cyclically on banks internal generation of capital and that no systematic covariation is present in bank systems with relatively few small banks.
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