Year-over-year growth in the producer price index for employment services ticked up in December. The index rose 2.3 percent that month. The year-over-year growth rate had been decelerating since September.

Producer price indexes track the change in price received by service producers over time. The change in price is measured from the perspective of the seller, in this case staffing firms.

The employment services industry includes employment placement agencies, temporary help services, executive search services and professional employer organizations.

Employment services is just one industry tracked by the producer price indexes.

Click on chart below to enlarge.