Investment banks play a critically important role in channeling capital from investors to corporations. Not only do they float and distribute new corporate securities, they also assist companies in the private placement of securities, arrange mergers and acquisitions, devise specialized financing, and provide other corporate financial services.

After sketching the history and evolution of investment banking, the authors describe the structure of the industry, focusing on the competitive forces at work within it today. They explore patterns of concentration and analyze the strategic and...