This volume traces broad outlines of the economy in the 20th century, its impact on the American worker, and evolution of statistical tools needed by policymakers, workers, employers, and researchers in a new century. An introductory essay (Donald M. Fisk) outlines the economic, technological, social, and business developments of the 20th century. Chapter 1 (N. Clyde Tucker, et al.) describes the evolution of collection of data on minorities, including a history of immigration to this country, early efforts to collect data on minorities through the decennial census, changes made to the Current Population Survey to help monitor the status of minorities in the labor force, the current labor force situation of minority workers, and current efforts to meet demands for better data on minorities. Chapter 2 (Thomas Moerhle, et al.) chronicles evolution of compensation practices in the 20th century and continuing efforts to capture them in useful statistical data. It discusses how variable pay benefits (profit sharing and stock options) are growing in importance and other benefits (family care and health promotion programs) have emerged. Chapter 3 (Daniel Hecker, Jerome R. Pikulinski and Norman C. Saunders) presents the evolution of classification systems in use in America over the past 100 years for both industry and occupational data collection efforts. It highlights how, though not often visible, economic classification schemes are critical in determining how well statistics reflect the true workings of the economy. Individual chapters contain reference lists, and sixty-two statistical tables are appended. (YLB)