We investigate how loan terms respond to competition between lenders when borrowers have multidimensional private information. In our model, competitive lenders screen borrowers using contracts that consist of an interest rate and a collateral requirement. Compared to a constrained planner’s outcome, the competitive market overprices low-collateral loans, and underprices high-collateral loans. The result is that high-quality borrowers pledge an excessive amount of collateral, which is socially wasteful due to its deadweight costs. The competitive outcome may be more or less efficient than a monopolist lender, depending on the size of those deadweight costs and the degree of selection externalities.
Keyword: Competition, selection, multidimensional private information