RT Article T1 Regression Discontinuity Evidence on the Effectiveness of the Minimum Legal E-Cigarette Purchasing Age Minimum Legal E-Cigarette Purchasing Age A1 DeSimone, Jeff A2 Ziebarth, Nicholas A2 Grossman, Daniel LA English PB West Virginia University YR 2022 UL https://krimdok.uni-tuebingen.de/Record/191268120X