The Effects of Local Workplace Smoking Laws on Smoking Restrictions and Exposure to Smoke at Work
利用加拿大安大略省1997-2004年100多个地方禁烟条例，发现这些法律显著增加了蓝领工人的工作场所吸烟限制，并使其二手烟暴露减少28-33%，但对其他工人影响较小且不显著。
We provide new evidence on the effects of workplace smoking restrictions by studying more than 100 local smoking ordinances in Ontario, Canada from 1997-2004. We advance the literature by examining local (as opposed to state or provincial) laws in a quasi-experimental framework and by explicitly testing for effects on worksite compliance and exposure to environmental tobacco smoke (ETS). We show that the local laws significantly increased workplace smoking restrictions for blue collar workers, and among this group the laws (and, by implication, workplace smoking bans) reduced ETS exposure by 28-33 percent. We find smaller and insignificant estimates for other workers.