Economies of Scale and Scope in International Banking
利用1988年全球商业银行数据，检验了规模经济和范围经济的存在性，发现仅在功能整合的银行体系中，小型银行存在规模经济，且贷款与投资交易活动间存在范围经济，而房地产/保险与投资银行组合则存在不经济。
We estimate a global cost function using an international database of commercial banks to test for economies of scale and scope. Banks he segregated into those headquartered in se~arated countries, which limit commercial banks from engaghg h non-traditional banking activities, and into banking countries, which permit some form of universal banking. Using data for 1988, the results show economies of scale to exist only for small and representative (middle quartile) banks in functionally integrated banking countries. Moreover, we investigate the potential for cost savings from combining traditional banking (lending) activities with non-banking financial activities. Evidence of economies of scope is found between lending and invesbnentltrading activities. Significant diseconomies of scope are found for combmations of real estate/msurance with investment banking activities. Country by country analysis is generally consistent with these results with the notable exceptio...