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Working Paper
Banking Across Borders With Heterogeneous Banks
This paper develops a model of banking across borders where banks differ in their efficiencies that can replicate key patterns in the data. More efficient banks are more likely to have assets, liabilities and affiliates abroad and have larger foreign operations. Banks are more likely to be active in countries that have less efficient domestic banks, are bigger and more open to foreign entry. In the model, banking sector integration leads to bank exit and entry and convergence in the return on loans and funding costs across countries. Bank heterogeneity matters for the associated welfare ...
Working Paper
Market Size and Trade in Medical Services
We measure the importance of increasing returns to scale and trade in medical services. Using Medicare claims data, we document that “imported” medical care—services produced by a medical provider in a different region—constitute about one-fifth of US healthcare consumption. Larger regions specialize in producing less common procedures, which are traded more. These patterns reflect economies of scale: larger regions produce higher-quality services because they serve more patients. Because of increasing returns and trade costs, policies to improve access to care face a ...