Peters Erica N, Rosenberry Zachary R, Schauer Gillian L, O'Grady Kevin E, Johnson Patrick S
Battelle Public Health Center for Tobacco Research.
Department of Health Services, University of Washington School of Public Health.
Exp Clin Psychopharmacol. 2017 Jun;25(3):208-215. doi: 10.1037/pha0000122. Epub 2017 Apr 24.
Although marijuana and tobacco are commonly coused, the nature of their relationship has not been fully elucidated. Behavioral economics has characterized the relationship between concurrently available commodities but has not been applied to marijuana and tobacco couse. U.S. adults ≥18 years who coused marijuana and tobacco cigarettes were recruited via Mechanical Turk, a crowdsourcing service by Amazon. Participants (N = 82) completed online purchasing tasks assessing hypothetical marijuana or tobacco cigarette puff consumption across a range of per-puff prices; 2 single-commodity tasks assessed these when only 1 commodity was available, and 2 cross-commodity tasks assessed these in the presence of a concurrently available fixed-price commodity. Purchasing tasks generated measures of demand elasticity, that is, sensitivity of consumption to prices. In single-commodity tasks, consumption of tobacco cigarette puffs (elasticity of demand: α = 0.0075; 95% confidence interval [0.0066, 0.0085], R² = 0.72) and of marijuana puffs (α = .0044; 95% confidence interval [0.0038, 0.0049], R² = 0.71) declined significantly with increases in price per puff. In cross-commodity tasks when both tobacco cigarette puffs and marijuana puffs were available, demand for 1 commodity was independent of price increases in the other commodity (ps > .05). Results revealed that, in this small sample, marijuana and tobacco cigarettes did not substitute for each other and did not complement each other; instead, they were independent of each other. These preliminary results can inform future studies assessing the economic relationship between tobacco and marijuana in the quickly changing policy climate in the United States. (PsycINFO Database Record
尽管大麻和烟草经常被一起使用，但其关系的本质尚未完全阐明。行为经济学已经描述了同时可得商品之间的关系，但尚未应用于大麻和烟草的使用情况。年龄≥18岁且同时使用大麻和烟草香烟的美国成年人通过亚马逊的众包服务Mechanical Turk招募。参与者（N = 82）完成了在线购买任务，评估了一系列每口价格下假设的大麻或烟草香烟吸食量；2个单一商品任务在只有1种商品可用时评估这些，2个跨商品任务在同时有固定价格商品可用时评估这些。购买任务产生了需求弹性的测量值，即消费对价格的敏感度。在单一商品任务中，烟草香烟吸食量（需求弹性：α = 0.0075；95%置信区间[0.0066, 0.0085]，R² = 0.72）和大麻吸食量（α = 0.0044；95%置信区间[0.0038, 0.0049]，R² = 0.71）随着每口价格的增加而显著下降。在烟草香烟吸食量和大麻吸食量都可用的跨商品任务中，一种商品的需求与另一种商品的价格上涨无关（p值>.05）。结果显示，在这个小样本中，大麻和烟草香烟既不相互替代也不相互补充；相反，它们相互独立。这些初步结果可为未来在美国快速变化的政策环境中评估烟草和大麻之间经济关系的研究提供参考。（PsycINFO数据库记录
