Mutual funds form the bedrock of retirement savings in the United States, and, considering their rapid growth over recent decades, are sure to become even more financially critical in the coming decades. Because the size of fees paid by investors to mutual fund advisers can strongly affect the return on investment, these fees have become contentious in Congress and the courts, with many arguing that investment advisers grow rich at the expense of investors. This groundbreaking book not only conceptualizes a new economic model for the industry but uses this model to test price competition between investment advisers. Its highly experienced authors track the growth of the industry over the past twenty-five years and present the arguments and evidence both for and against theories of adviser malfeasance, as well as the assertion that market forces fail to protect investors' returns from excessive fees. The volume briefly reviews the regulatory history of mutual fund fees and leading case decisions addressing excessive fees. It also reveals the extent to which the governance structure of mutual funds impacts fund performance. There is no greater text for those who seek to understand today's mutual fund industry, including investors, money managers, fund directors, securities lawyers, economists, and those concerned with regulatory policy toward mutual funds.