Molloy Eamon
Congressional Budget Office, US Congress, Washington, DC, USA.
Health Econ. 2016 Feb;25(2):148-64. doi: 10.1002/hec.3126. Epub 2015 Jan 9.
Endogenous targeting of alcohol advertisements presents a challenge for empirically identifying a causal effect of advertising on drinking. Drinkers prefer a particular media; firms recognize this and target alcohol advertising at these media. This paper overcomes this challenge by utilizing novel data with detailed individual measures of media viewing and alcohol consumption and three separate empirical techniques, which represent significant improvements over previous methods. First, controls for the average audience characteristics of the media an individual views account for attributes of magazines and television programs alcohol firms may consider when deciding where to target advertising. A second specification directly controls for each television program and magazine a person views. The third method exploits variation in advertising exposure due to a 2003 change in an industry-wide rule that governs where firms may advertise. Although the unconditional correlation between advertising and drinking by youth (ages 18-24) is strong, models that include simple controls for targeting imply, at most, a modest advertising effect. Although the coefficients are estimated less precisely, estimates with models including more rigorous controls for targeting indicate no significant effect of advertising on youth drinking.
酒精广告的内生性目标定位给实证识别广告对饮酒的因果效应带来了挑战。饮酒者偏爱特定的媒体;企业认识到这一点,并将酒精广告投放于这些媒体。本文通过利用新颖的数据(其中包含媒体观看和酒精消费的详细个体测量数据)以及三种独立的实证技术克服了这一挑战,这三种技术相较于以往方法有显著改进。首先,对个体观看的媒体的平均受众特征进行控制,考虑了酒精企业在决定广告投放位置时可能会考虑的杂志和电视节目的属性。第二种设定直接控制一个人观看的每个电视节目和杂志。第三种方法利用了2003年全行业广告投放规则变化导致的广告曝光差异,该规则规定了企业可以在哪里做广告。尽管青年(18 - 24岁)的广告与饮酒之间的无条件相关性很强,但包含简单目标定位控制的模型最多意味着适度的广告效应。尽管系数估计得不太精确,但包含更严格目标定位控制的模型估计表明广告对青年饮酒没有显著影响。