Countries differ in the way their financial activities are organized. In Anglo-Saxon countries such as the U.S. and the U.K., financial systems are dominated by stock markets whereas in Continental Europe and Japan, banks play a predominant role. Why do countries differ in the configuration of their financial systems? We argue that national culture plays a significant role. We find that countries characterized by higher uncertainty avoidance, as an attribute of their national culture, are more likely to have a bank-based system.http://deepblue.lib.umich.edu/bitstream/2027.42/57264/1/wp884 .pd