[Excerpt] This volume represents another effort by Research in the Sociology of Organizations to focus on a crucial issue in organizational sociology. In some of the previous volumes, we concentrated on organizations and professions (Volume 8, 1991), the structuring of participation in organizations (Volume 7, 1989), and the social psychological processes in organizations (Volume 3, 1984). This volume concentrates on one of the most important emerging issues in organizational sociology—the issue of organizational demography.