We provide evidence on the costs and profitability of relationship len
ding by banks. We derive bank-specific measures of loan rate smoothing
for small business borrowers in response to exogenous shocks to their
credit risk and to interest rates, and then estimate cost and profit
functions to examine how smoothing affects bank costs and profits. Our
results suggests that, in general, loan rate smoothing in response to
a credit risk shock is not part of an optimal long-term contract betw
een a bank and its borrower, while loan rate smoothing in response to
an interest-rate shock is. (C) 1998 Elsevier Science B.V. All rights r
eserved.