We study the effects of structural changes in banking markets on the supply of credit to small businesses. Specifically, we examine whether bank mergers and acquisitions (M&As) and entry have “external” effects on small business loans by other banks in the same local markets. The results suggest modest positive external effects from these dynamic changes in competition, except that large banks may reduce small business lending in reaction to entry. We confirm bank size and age as important determinants of this lending, and show that the measured age effect does not appear to be driven by local market M&A activity.

We test hypotheses about the effects of bank size, foreign ownership, and distress on lending to informationally opaque small firms using a rich new data set on Argentinean banks, firms, and loans. We also test hypotheses about borrowing from a single bank versus multiple banks. Our results suggest that large and foreign-owned institutions may have difficulty extending relationship loans to opaque small firms. Bank distress appears to have no greater effect on small borrowers than on large borrowers, although even small firms may react to bank distress by borrowing from multiple banks, raising borrowing costs and destroying some relationship benefits.