In recent years, the increased concentration of activity in the banking system has received much attention. In addition, numerous central banks have expanded their range of policy tools to include paying interest on reserves. The objective of this paper is to study the implications of concentration in the banking sector and the effects of various reserve policies. Changes in the competitive structure affect investment, risk‐sharing, and social welfare. In general, perfect competition should not be a regulatory goal for the banking system. Moreover, it is generally not optimal to pay the same interest rate on required reserves as excess reserves. (JEL O42, D42, E52)

中文翻译：

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银行竞争，资本积累和对储备金的兴趣

近年来，越来越多的活动集中在银行系统中，引起了人们的广泛关注。此外，许多中央银行已经扩大了其政策工具的范围，包括支付准备金利息。本文的目的是研究集中在银行部门的影响以及各种准备金政策的影响。竞争结构的变化会影响投资，风险分担和社会福利。通常，完全竞争不应成为银行系统的监管目标。而且，通常不理想的是对所需准备金支付与超额准备金相同的利率。（ JEL O42，D42，E52）