RT Article T1 Regression Discontinuity Evidence on the Effectiveness of the Minimum Legal E-Cigarette Purchasing Age A1 DeSimone, Jeff A1 Ziebarth, Nicolas R. A1 Grossman, Daniel 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