Schleicher Nina C, Johnson Trent O, D'Angelo Heather, Luke Douglas A, Ribisl Kurt M, Henriksen Lisa
Research Statistician, Stanford University School of Medicine, Stanford Prevention Research Center, Palo Alto, CA.
Manager, Tobacco Control Policy Studies, Stanford University School of Medicine, Stanford Prevention Research Center, Palo Alto, CA.
Tob Regul Sci. 2018 May;4(3):3-9. doi: 10.18001/TRS.4.3.1.
Researchers and regulators study the advertised price of tobacco products to evaluate compliance with minimum price policies, tax increases, and geodemographic marketing. However, few studies report reliability of advertised price and none address its concordance with receipt price.
In a sample of US tobacco retailers (N=1972), data collectors purchased the leading brand of non-menthol or menthol cigarettes, recorded advertised prices, whether sales tax was included and price was discounted. Intraclass correlation coefficients (ICCs) were computed for the same measures by different observers (reliability), and for receipt and advertised pack price (validity). Discrepancy between receipt and advertised price was modeled as a function of store type and presence of a discount.
Advertised price was assessed reliably (ICCs = 0.74 to 0.87) and concordance with receipt price was near perfect (ICCs = 0.96 to 1.00). Prices were identical in 77.7% of stores for Marlboro and 78.1% for Newport. Differences between receipt and advertised price were related to store type and presence of a discount for Marlboro, but not for Newport.
Findings validate a common measure of cigarette price in research on minimum price compliance, effects of tax increase and industry marketing.
研究人员和监管机构通过研究烟草产品的广告价格来评估最低价格政策、税收增加以及地理人口统计学营销的合规情况。然而，很少有研究报告广告价格的可靠性，且没有一项研究探讨其与收据价格的一致性。
在美国烟草零售商样本（N = 1972）中，数据收集者购买了主要品牌的非薄荷醇或薄荷醇香烟，记录广告价格、是否包含销售税以及价格是否打折。计算不同观察者对相同测量指标的组内相关系数（ICC）（可靠性），以及收据价格和广告包装价格之间的组内相关系数（有效性）。将收据价格与广告价格之间的差异建模为商店类型和折扣情况的函数。
广告价格评估具有可靠性（ICC = 0.74至0.87），与收据价格的一致性近乎完美（ICC = 0.96至1.00）。万宝路在77.7%的商店中价格相同，新港在78.1%的商店中价格相同。万宝路的收据价格与广告价格之间的差异与商店类型和折扣情况有关，但新港并非如此。
研究结果验证了在最低价格合规性、税收增加的影响以及行业营销研究中常用的香烟价格测量方法。
