In this paper, we apply an algorithm developed by Martin Weitzman to quantify the extent of diversity among the business models of financial intermediaries at an international level. In particular, we investigate the relationship between the diversity of the business models of EU national banking systems and their profitability and riskiness. We show how Weitzman's approach can be generally applied to the issue at hand; as a by‐product, the analysis allows us to assess whether the diversity among banking systems was affected by the imported systemic financial crises of 2007/8 as well as its domestic sequel centered on the sovereign debt crisis that occurred in 2010–12. The motivation for this paper is twofold. First, we provide an operational measure of the diversity of business models among banking sectors. Second, we enrich the economic literature relating to banking business models by providing a macro‐founded analysis. To this end, we highlight the range of diversity of national banking business models correlated with high performances in terms of profitability and riskiness.

中文翻译：

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国家银行体系的多样性如何？银行业务模型，盈利能力和风险分析

在本文中，我们应用了马丁·韦茨曼（Martin Weitzman）开发的算法来量化国际范围内金融中介机构业务模型之间的差异程度。尤其是，我们研究了欧盟国家银行体系业务模式的多样性与其获利能力和风险之间的关系。我们展示了Weitzman的方法如何可以普遍应用于当前的问题。作为副产品，分析使我们能够评估银行体系之间的多样性是否受到2007/8的进口系统性金融危机及其以2010-12年度发生的主权债务危机为中心的国内续集的影响。本文的动机是双重的。首先，我们提供了一种衡量银行部门之间业务模式多样性的操作方法。第二，通过提供宏观基础的分析，我们丰富了与银行业务模型有关的经济文献。为此，我们着眼于在盈利能力和风险方面与高绩效相关的国家银行业务模式的多样性。