Boundedly Rational Banks’ Contribution to the Credit Cycle
Tobias F. Rötheli
University of Erfurt
June 15, 2012
Journal of Socio-Economics, Forthcoming
We investigate how banks’ boundedly rational learning influences their views about default risks over the business cycle. Our analysis details the direction and the magnitude of these effects assuming that banks update probability in a Bayesian way. With a limited experience span lenders are liable to overestimate (underestimate) losses from defaulting loans early (late) in the boom. Depending on their experience span, banks turn over-optimistic and underprice default risk 3 to 5 years into the boom. During recessions an overpricing of risk begins just quarters into the recession. Our simulations are calibrated with U.S. data and provide evidence for the view that banks contribute to excessive lending during the upswing and to credit crunches in recessions.
Number of Pages in PDF File: 25
Keywords: Boundedly rational learning, loan-loss expectations, credit cycle
JEL Classification: E51, D84, G21, E32
Date posted: June 9, 2009 ; Last revised: July 20, 2012
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