RT Journal Article SR Electronic T1 Empirical analysis on the illicit trade of cigarettes in Vietnam JF Tobacco Control JO Tob Control FD BMJ Publishing Group Ltd SP tobaccocontrol-2019-055598 DO 10.1136/tobaccocontrol-2019-055598 A1 Hien Thi Thu Nguyen A1 Long Thanh Giang A1 Toan Ngoc Pham YR 2020 UL http://tobaccocontrol.bmj.com/content/early/2020/05/06/tobaccocontrol-2019-055598.abstract AB Background This paper examined how a higher tax on tobacco would affect illicit trade in Vietnam.Methodology and data This paper used the gap method to estimate the gap between cigarette domestically tax-paid sales and domestic consumption. Data were from the tax-paid sales by the Vietnam Steering Committee on Smoking and Health (VINACOSH), the Vietnam Tobacco Association, the General Tax Department, as well as two rounds of the Global Adult Tobacco Survey in 2010 and 2015.Key results The results indicated that Vietnam had a negative volume of illicit trade, either a result of under-reporting of tobacco use or due to net smuggling of tax-paid cigarettes out of the country. Furthermore, the trend showed an increased negative volume over time, which indicated that increases in tobacco taxes in the interleading years did not result in an increase in illicit trade in tobaccos in Vietnam.Conclusions Vietnam’s low prices on domestic cigarettes created favourable conditions for cigarette smugglers and provided easy access to illicit cigarettes for the Vietnamese people, but the absence of a relationship between tax changes and smuggling suggested that potential increases in the excise tax should not be discouraged by the threat of an increase in illicit trade. The government should increase taxes on cigarettes to raise domestic cigarette prices and take strong policy measures to create a more transparent social environment, therefore effectively reducing the prevalence of illicit cigarettes in Vietnam.