We study the evolution of investment-banking relationships from 1933 to 2007. Relationship exclusivity and client concerns for the state of their banking relationships were strong through the first part of our sample period but then entered a period of sharp decline beginning around 1970. We interpret the bank-client relationship as an informal governance mechanism for curbing opportunistic behavior in a weak contracting environment and examine how technological change aggravated conflicts of interest within investment banks and between banks and their clients. This perspective sheds light on why trust between banks and their clients now appears to be in short supply.Received March 2, 2018; editorial decision June 11, 2018 by Editor Paolo Fulghieri.

We develop a model in which individual and institutional reputation concerns conflict with one another to study why investment bank reputation concerns may have diminished in recent years. Unproven but talented bankers have incentive to signal their ability through actions that may or may not best serve their clients. In the spirit of Kreps (1990), we treat the bank as a hierarchical firm whose only asset is its institutional reputation for curbing behavior that is suboptimal for the client. The conflict between individual and institutional reputation concerns is more likely to resolve in favor of institutional reputation when firms recruit only the most talented people, and less so when unique ability is especially valuable. We discuss how technological change has contributed to a “star” culture that is unfavorable toward preservation of institutional reputation.