Ettner S L
Harvard Medical School, Department of Health Care Policy, Boston, MA 02115, USA.
Soc Sci Med. 1997 Jan;44(2):251-60. doi: 10.1016/s0277-9536(96)00160-8.
This paper uses two-stage instrumental variables methods to examine whether unemployment affects alcohol use and symptoms of dependence, and if so, in which direction. Data were obtained from the 1988 National Health Interview Survey. The outcomes examined were average daily consumption during the previous two weeks and a summary measure of the number of symptoms related to alcohol dependence during the previous year. After eliminating potential bias due to reverse causality, evidence was found that non-employment significantly reduces both alcohol consumption and dependence symptoms, probably due to an income effect. Involuntary unemployment had a mixed effect-job loss increased the consumption of alcohol in the overall sample but reduced dependence symptoms among single respondents. Studies of the impact of alcohol use on economic outcomes should take potential reverse causality into account.
本文采用两阶段工具变量法来检验失业是否会影响酒精使用及依赖症状,若有影响,影响方向如何。数据来自1988年全国健康访谈调查。所考察的结果变量为前两周的平均每日饮酒量以及上一年与酒精依赖相关症状数量的汇总指标。在消除了由反向因果关系导致的潜在偏差后,发现证据表明非就业显著降低了酒精消费和依赖症状,这可能是由于收入效应。非自愿失业产生了混合效应——总体样本中失业增加了酒精消费,但单身受访者的依赖症状有所减轻。关于酒精使用对经济结果影响的研究应考虑潜在的反向因果关系。