Question: We are interested only in the data for people with a high school education. Subset wage2 to keep only those where educ==12. Save the subsetted
We are interested only in the data for people with a high school education. Subset wage2 to keep only those where educ==12. Save the subsetted data as wage2 (which will replace the full dataset in R's memory - of course, it won't replace the original version from the wooldridge package)
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