A Simple Model of Credit Rationing with Information Externalities
Credit-rationing model similar to Stiglitz and Weiss  is combined with the information externality model of Lang and Nakamura  to examine the properties of mortgage markets characterized by both adverse selection and information externalities. In a credit-rationing model, additional information increases lenders ability to distinguish risks, which leads to increased supply of credit. According to Lang and Nakamura, larger supply of credit leads to additional market activities and therefore, greater information. The combination of these two propositions leads to a general equilibrium model. This paper describes properties of this general equilibrium model. The paper provides another sufficient condition in which credit rationing falls with information. In that, external information improves the accuracy of equity-risk assessments of properties, which reduces credit rationing. Contrary to intuition, this increased accuracy raises the mortgage interest rate. This allows clarifying the trade offs associated with reduced credit rationing and the quality of applicant pool.
|Date of creation:||Apr 2005|
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- Besanko, David & Thakor, Anjan V, 1987. "Collateral and Rationing: Sorting Equilibria in Monopolistic and Competitive Credit Markets," International Economic Review, Department of Economics, University of Pennsylvania and Osaka University Institute of Social and Economic Research Association, vol. 28(3), pages 671-89, October.
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- Ling, David C. & Wachter, Susan M., 1998. "Information Externalities and Home Mortgage Underwriting," Journal of Urban Economics, Elsevier, vol. 44(3), pages 317-332, November.
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