[...] concludes an in-depth study of 3,066 U.S. workers by the Rand Corp., Harvard Medical School and the University of California, Los Angeles. — Nearly one in five workers — a share the study calls "disturbingly high" — say they face a hostile or threatening environment at work, which can include sexual harassment and bullying. Workers who have to face customers endure a disproportionate share of abuse. Workers enjoy considerable autonomy: more than 80 percent say they get to solve problems and try out their own ideas. [...] 58 percent say their bosses are supportive, and 56 percent say they have good friends at work.