Compensation Consultant, Independent
We have run one for four years at a Dutch bank. 12% of employees have a balance. You are right about the skew: participation among the top third by salary is 21%, in the bottom third it is 4%. The main use is not sabbaticals at all but reducing to a four-day week in the last two or three years before retirement, which managers find far easier to accommodate than a three-month absence.

