Question: 2 Question The first (and only) exercise is based on the data set Birthweight_Smoking from the Stock and Watson companion website here. The data is

 2 Question The first (and only) exercise is based on thedata set "Birthweight_Smoking" from the Stock and Watson companion website here. The

2 Question The first (and only) exercise is based on the data set "Birthweight_Smoking" from the Stock and Watson companion website here. The data is used in the paper The Costs of Low Birth Weight, Quarterly Journal of Economics, August 2005, by Douglas Almond, Kenneth Chay and David Lee. It is linked National Natality-Mortality Detail files, which contains a census of infant births and deaths. The data in ps5_birthweight_smoking . dta are for births in Pennsylvania in 1989. You can see a description of the data on the website. 2.1 Question Load the data (all libraries needed are the same as last exercise, and should be loaded at this point), and call it bw_smoking. 4 bw_smoking

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