The effect of state laws designed to prevent nonmedical prescription opioid use on overdose deaths and treatment
研究美国两项州法律（疼痛管理诊所法和医生购物法）对减少处方阿片类药物过量死亡和治疗入院的效果，采用双重差分法分析行政数据，发现两者均能降低过量死亡，医生购物法还减少了治疗入院。
Nonmedical use of prescription opioids has reached epidemic levels in the United States and globally. In response, federal, state, and local governments are taking actions to address substantial increases in prescription opioid addiction and its associated harms. This study examines the effect of two state laws specifically designed to curtail access to prescription opioids to nonmedical users: pain management clinic and doctor shopping laws. We use administrative data on overdose deaths and admissions to specialty substance use disorder treatment coupled with a differences-in-differences design. Our findings suggest that both pain management clinic and doctor shopping laws have the potential to reduce prescription opioid overdose deaths. Moreover, doctor shopping laws appear to reduce prescription opioid treatment admissions. As many states have adopted these laws in recent years, the full effects of the laws may not yet be realized. Future research using more postlaw passage data should reevaluate the effectiveness of these laws.