A study conducted by Joan Williams of the University of California College of the Law, also in San Francisco, and others concluded that introducing more stable employee schedules increased sales and productivity at The Gap, a retailer.

同样位于旧金山的加利福尼亚大学法学院的琼·威廉姆斯 (Joan Williams) 和其他人进行的一项研究得出结论，引入更稳定的员工时间表可以提高零售商 The Gap 的销售额和生产力。