JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact support@jstor.org.. Wiley and Financial Management Association International are collaborating with JSTOR to digitize, preserve and extend access to Financial Management. He is the author of Portfolio Management and a number of articles in the areas of corporate finance and investments. W hile major theoretical advanceshave been made in recent years with respect to the longer-range financial decisions of the firm, research devoted to shorter-range or working capital decision-making would appear to have been less productive. At the same time, we can probably attribute a large number of business failures in recent years to an inability of financial managers to plan and control properly the current assets and current liabilities of their respective firms. Current assets collectively represent the single largest investment for many firms, while current liabilities account for a major part of total financing in many instances. Toward the end of refocusing the attention of financial theorists and academic researchers on the "top half" of the balance sheet, this paper summarizes eight somewhat distinct approaches to working capital management. The first three, aggregate guidelines, constraint set, and cost balancing, are partial models; the next two approaches, probability models and portfolio theory, stress future uncertainty and interdependencies; while the last three approaches, mathematical programming, multiple goals, and financial simulation, have a broader, systematic focus. The eight approaches should be considered as representative of the existing literature rather than as an exhaustive survey. The paper also synthesizes the important features of these existing approaches.