Richard Brealey presents a brief, nontechnical description of current research on investment management and its implications for the investment manager. He covers market efficiency, valuation, and modern portfolio theory in a book that The New York Times noted "rates high as reading for every...

The public and private sector costs of capital differ in the presence of taxes, because taxes are a cost to the private but not the public sector. We use a quasi-arbitrage approach to show how to include taxes in a comparison of capital costs. We find that taxes induce distortions that generate...