Home < Policies, Employee & Labor Relations < Labor Relations and Collective Bargaining < Systemwide Collective Bargaining Units < Postdoctoral Scholar Unit (PX) < Demographics of the Postdoctoral Scholars Unit (PX)
The Postdoctoral Scholars Unit (PX) is a systemwide bargaining unit comprised of postdoctoral scholars and postgraduate researchers who work in support of faculty and lecturers. The unit, which includes a total of about 5,700* postdoctoral and postgraduate employees, is represented by the United Auto Workers (UAW).
Campus by campus populations of the PX unit follow (numbers are approximate):
| Location | Headcount |
| Berkeley | 1017 |
| Davis | 758 |
| Irvine | 279 |
| Los Angeles | 1005 |
| Merced | 15 |
| Riverside | 196 |
| San Francisco | 1046 |
| Santa Barbara | 315 |
| Santa Cruz | 133 |
| San Diego | 965 |
| Total | 5729 |
*DWH November 2008