Impacts of smoking ban policies on restaurants in Seoul, South Korea: Analysis of objective sales information

BACKGROUND: From July 2013 to January 2015, the smoking ban instituted in restaurants in South Korea gradually expanded to cover all restaurants and bars, moving by size of restaurant (≤99 m2, 100-149 m2, ≥150 m2). This study measured the impacts of the smoking ban for restaurants. METHODS: This study examined credit/check/debit card sales data for every September and October from 2012 to 2015 in 711 census tracts in Seoul, South Korea. We accounted for total restaurant sales in each census tract. Our model controlled for the sales amounts for each census tract, type of restaurant, monthly business survey index, number of restaurants, daily average temperature, daily precipitation, and day of the week, and a dummy for census tract. RESULTS: These were some positive associations with increase in total sales. However, the significance of the coefficients was not consistent over this period. Overall, our results showed no significant negative effects of SBP on restaurants. CONCLUSIONS: Smoking ban policies produced benefits in terms of health outcomes, without causing significant negative impacts on sales.