Unfortunately, that's where a lot of the certainty ends
The Impact of E-cigarettes 2015 Smoking Rates Plummet to Record Lows in the United States According to data collected by the Centre for Disease Control (CDC) the adult smoking rate in the U.S
E-cigarettes are also known by different names, including vapes, vape products, vaping products, electronic smoking products, vaporizers, mods, e-hookahs, and electronic nicotine delivery systems. For the purposes of this evidence summary, we will loosely refer to the entire category of devices as e-cigarettes
"And Kenny gave him a pop to drink
Consistent with LaFaive, Fleenor and Nesbit (2008), we employ a linear trend to capture the variation in smoking intensity through time, as indicated in Equation 3: Cons it = Smoke it * f(Trend t ) where f(Trend) represents the above-described linear function of smoking intensity and its systematic under-reporting