Harvard School of Public Health
By now, you must know how many packs of cigarettes are in a carton
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If we focus on the estimates made with the packs variable, Table 1 shows that the slope coefficient is equal to -0.747, -0.725, and -0.793, with heteroscedasticity and autocorrelation-consistent (HAC) standard error of 0.150, 0.026 and 0.139, for the three periods 20052021, 20052010 and 20112021, respectively
Here's the math and everything you need to get started
this means that your wallet will thank you later
