Further, our Research Department has made payment system research an important part of its agenda. The mix of practical experience and research has resulted in a unique perspective on payment system issues that led us to organize a symposium on the U.S. payment system, held on May 25-26, 1988, in Williamsburg, Virginia. Reflecting our belief in the importance of combining both practical experience and theory in addressing payment issues, we invited practi­ tioners, scholars, and policymakers to share their ideas. The symposium provided an opportunity for those researchers who are studying p- xi PREFACE xii ment issues to present their ideas and to have these ideas evaluated by experienced practitioners.