"...virtually all of the increase in current smoking prevalence in Minnesota is associated with the e-cig tax and the associated decrease in successful quits."

The Impact of E-Cig Taxes on Smoking Rates: Evidence From Minnesota

"Specifically, the 95 percent e-cig tax in Minnesota, the first such tax increase in the nation, led to a decrease in cigarette smoking cessation by about 1.14 percentage points -- approximately a 5 percent increase in relative smoking participation. In fact, virtually all of the increase in current smoking prevalence in Minnesota is associated with the e-cig tax and the associated decrease in successful quits."