RT Article T1 Regression Discontinuity Evidence on the Effectiveness of the Minimum Legal E-Cigarette Purchasing Age A1 DeSimone, Jeff A2 Ziebarth, Nicolas R. A2 Grossman, Daniel LA English PB National Bureau of Economic Research (NBER) YR 2022 UL https://krimdok.uni-tuebingen.de/Record/1912681196 DO 10.3386/w30614