This pamphlet is the product of a collaborative effort of the staff of the Fiscal Affairs Department (FAD). The final version of the pamphlet was prepared by Jeffrey M. Davis and James Daniel, drawing on substantial input from a large number of colleagues in FAD. Peter S. Heller was particularly helpful in providing guidance and comments on earlier drafts of the pamphlet. Advice and encouragement from Vito Tanzi (Director of FAD) is gratefully acknowledged. The pamphlet also benefitted from comments by staff of other departments and was edited by Gail Berre of the External Relations Department.