"The main factor that changes the cost calculation is the number of people likely to use the leave, and that largely depends on whether the program guarantees a worker will be able to return to the job after taking leave and what kinds of leave are covered.... [P]ersonal medical leave is the most expensive to cover, parental leave falls in the middle, and family care leave is the least costly.... Based on private sector use of leave afforded under the [FMLA, one study] estimated that if 13 million workers took paid leave for a medical issue for an average of 4.7 weeks at $452 per week, it would cost $27.5 million in benefits."  MORE >>