Department of Behavioral Science, University of Kentucky College of Medicine, 1100 Veterans Drive, Medical Behavioral Science Building, Lexington, KY 40536-0086, USA.
Department of Family & Community Medicine, University of Kentucky College of Medicine, 2195 Harrodsburg Road, Lexington, KY 40504, USA.
Pharmacol Biochem Behav. 2023 Nov;232:173638. doi: 10.1016/j.pbb.2023.173638. Epub 2023 Sep 16.
Despite a rich history of behavioral economic research on substance use there remains a need for further exploration of behavioral mechanisms that may underlie the etiology or persistence of substance use disorder. The purpose of this study was to measure the association between delay discounting and the endowment effect in people who smoke cigarettes, use cocaine, and controls, using online crowdsourcing.
Participants were categorized to a cocaine group (n = 36), cigarette group (n = 48), or control group (n = 47) based on recent reported drug use. Based on group, participants completed up to three delay discounting tasks (i.e., money, cigarettes and cocaine), an endowment effect task for multiple commodities, and other questionnaires.
Participants in the cocaine and cigarette group demonstrated an increased rate in discounting for money compared to controls. Participants in the cocaine group had a less pronounced endowment effect for beer, compared to controls, as suggested by willingness to accept less to sell beer. A significant negative association was found between endowment ratios for non-drug commodities and delay discounting for cigarettes, but not monetary or cocaine delay discounting, indicating an inconsistent relationship between the two measures.
These results support prior research demonstrating a relationship between cocaine and cigarette use and delay discounting and extend that work by measuring the association between delay discounting and the endowment effect. Future research should include both loss aversion and endowment effect tasks and compare their relationship with delay discounting among people that use drugs.
尽管在物质使用的行为经济学研究方面有丰富的历史，但仍需要进一步探索可能是物质使用障碍病因或持续存在的行为机制。本研究的目的是使用在线众包来衡量吸烟、使用可卡因的人和对照组之间的延迟折扣与禀赋效应之间的关联。
根据最近报告的药物使用情况，将参与者分为可卡因组（n=36）、香烟组（n=48）或对照组（n=47）。基于组，参与者完成了多达三个延迟折扣任务（即金钱、香烟和可卡因）、多个商品的禀赋效应任务以及其他问卷。
与对照组相比，可卡因组和香烟组的参与者表现出金钱折扣率增加。与对照组相比，可卡因组对啤酒的禀赋效应较小，这表明愿意接受更少的钱来出售啤酒。非毒品商品的禀赋比率与香烟的延迟折扣之间存在显著的负相关，但与货币或可卡因的延迟折扣无关，这表明这两个措施之间的关系不一致。
这些结果支持了先前的研究，表明可卡因和香烟的使用与延迟折扣之间存在关系，并通过测量延迟折扣与禀赋效应之间的关联来扩展该研究。未来的研究应包括损失厌恶和禀赋效应任务，并比较它们与使用药物的人之间的延迟折扣的关系。
