“When San Francisco four years ago became the first city in the country to require employers to offer paid sick leave to their employees, it was considered controversial because of the host of unknowns that came alongside: Would employees abuse the privilege? Would it cost too much for businesses? What unintended consequences would show up?

Now, the Institute for Women’s Policy Research has released a survey of how the policy has worked for the first four years, during which city employers added 59,000 employees – 17 percent of the city’s work force – to the rolls of those receiving that benefit. The results released Thursday, generally favorable according to analysts, are important for where the idea might go elsewhere in the country and as background in the national debate over health-care policy.”