FRED has added 8 data series from the Ellieroth and Michaud (EM) dataset of monthly quit and layoff rates: (1) how frequently U.S. workers who leave employment have either quit or have been laid off and (2) how frequently those workers leave the labor force.
Ellieroth and Michaud analyze household data from the US Bureau of Labor Statistics’ (BLS) Current Population Survey monthly basic files data to compute their quit and layoff rates. More details are available here.