Services today account for a major share of employment and national product in the U. S., with the employment share up from 57 percent immediately post-war to well over 70 percent today (if communications, utilities and transportation are included). This transformation (which is also occurring with varying lags in the othereconomically advanced economies) is driven by a variety of forces: by changes in consumer demand, by the rising demand for health and educational services, by new ways in which businesses are organized and the increasing importance ofcertain functions (e. g. new demands for...