“…Another longitudinal study assessing the effects of local restaurant smoking regulations on anti-smoking attitudes in the United States reported positive association between having a strong local regulation and making a quit attempt at follow-up among adult-smokers who already made a quit attempt at baseline (Albers et al, 2007). Beyond the primary benefits of reduced SHS exposure and promoting smoking cessation behaviors, evidence also suggests that smoke-free legislation may positively influence societal norms about tobacco use (Albers et al, 2004(Albers et al, , 2007Brown et al, 2009;Fong et al, 2006). In addition, previous studies have shown that smoke-free policy may encourage positive behavioural change in other settings, referred to as norm spreading (Cheng, Glantz and Lightwood, 2011;Cheng et al, 2015).…”