It can be particularly dangerous for children and young adults, as they are more susceptible to the effects of nicotine
Similarly, in Australia, many brands are allowed to sell 30,40, or 50 cigarettes in a single standard-sized packaging
However, heres the real (but more complicated) answer: A few studies have observed temporary hormone changes, but these effects swing both ways
Even so, everywhere Bourdain goes young cooks greet him as Chef. When I asked him if that felt strange, he bristled slightly
The model is: $$y_t = \rho W y_t + X_t \beta + \mu_i + \epsilon_t$$ In words, cigarette consumption in state $i$ depends on (1) the average consumption of neighboring states (weighted by $W$, with strength $\rho$), (2) the states own price and income ($X_t \beta$), and (3) a state-specific intercept ($\mu_i$)