Using data from a stated preferences experiment in the Netherlands, we find that replac- ing full-time pension schemes with schemes that offer gradual retirement opportunities induce workers to retire one year later on average. Total lifetime labour supply, however, decreases by 3.4 months, because the positive effect of delayed retirement on labour sup- ply is cancelled out by a reduction in working hours in the years before full retirement. The impact of gradual retirement schemes is, however, heterogeneous across groups of workers. Workers in bad health who gain access to gradual retirement postpone their re- tirement by 1.7 months more than workers in good health. This suggests that introduction of gradual retirement alleviates, to a ce...