Changes in Twelfth District local banking market structure during a period of industry consolidation
研究了第十二联邦储备区在行业整合期间地方银行市场集中度的变化，发现城市市场集中度适度上升而农村市场下降，但高集中度市场在反垄断作用下出现下降。
consolidation’s potential effect on competition in local banking markets. Examining this period for the Twelfth Federal Reserve District, I find, on the whole, moderate increases in concentration in urban markets and decreases in concentration in rural markets, although a number of local markets have shown large increases in concentration to high levels. However, consistent with antitrust enforcement and competition, I find negative and highly statistically significant effects of concentration on the long-run change in concentration and, for high enough levels of initial concentration, actual decreases in concentration. 1.