The growth of financial intermediation research has yielded a host of questions that have pushed "design" issues to the fore even as the boundary between financial intermediation and corporate finance has blurred. This volume presents review articles on six major topics that are connected by information-theoretic tools and characterized by valuable perspectives and important questions for future research. Touching upon a wide range of issues pertaining to the designs of securities, institutions, trading mechanisms and markets, industry structure, and regulation, this volume will encourage bold new efforts to shape financial intermediaries in the future.