Time will tell if abuses still come, or unforeseen problems arise, and the Legislature needs to step in. But history is promising. San Francisco passed a citywide paid sick leave ordinance in 2006; a 2011 study by the Institute for Women’s Policy Research found that the vast majority of workers took fewer sick days than entitled to by law, and a quarter of them took no sick days at all. Here in Massachusetts there may be some administrative hassles at the start. But overall, the Commonwealth should be proud of being in the forefront of national public policy — and for this thoughtful, reasoned approach to implementing an important law.