rates above 30% signal strong customer satisfaction
Corey CG, Ambrose BK, Apelberg BJ, King BA
One of the main neurotransmitters affected by nicotine is dopamine
E-cigarette is an abbreviation for electronic cigarette. Just as its name suggests, an e-cigarette is an electronic device designed to emulate the tobacco smoking experience
We wonder whether such children may not eventually become cigarette smokers in their teenage years as they discover the advantage of self-stimulation via nicotine
synth2 cigsale lnincome age15to24 retprice beer /// cigsale(1988) cigsale(1980) cigsale(1975), /// trunit(3) trperiod(1989) xperiod(1980(1)1988) /// nested allopt The key options are: trunit(3) treated unit is California (state == 3) trperiod(1989) treatment begins in 1989 xperiod(1980(1)1988) average covariates over 19801988 for matching nested use nested optimization (outer V-weights, inner W-weights) allopt try multiple starting values to avoid local optima Pre-treatment fit Fitting results in the pretreatment periods: Treated Unit: California Treatment Time: 1989 Number of Control Units = 38 Root Mean Squared Error = 1.75567 Number of Covariates = 7 R-squared = 0.97434 The synthetic control explains 97.4% of the pre-treatment variation in Californias cigarette sales (R-squared = 0.974), with a Root Mean Squared Error (RMSE) of just 1.76 packs per capita
