The paper analyzes financial innovations by investment banking firms in an environment in which client firms find it costly to switch between banks and can delay their utilization of bank services. An underlying assumption is that financial products, unlike many other innovative products, cannot...

Tirole (1982) is commonly interpreted as proving that bubbles are impossible with finitely many rational traders with common priors. We study a simple variation of his model in which bubbles can occur, even though traders have common priors and even though it is common knowledge that the asset...

Tirole (1982) is commonly interpreted as proving that bubbles are impossible with finitely many rational traders with common priors. We study a simple variation of his model in which bubbles can occur, even though traders have common priors and common knowledge that the asset has no fundamental...