如何在Stata中分组观察

Question

I'm a beginner with stata so this question might be easy for some of you. I have a Dataset with Firmspecific data. One variable is Branche which contains the following lines of business: Consumer , Utilities , Food/Beverage , Technology , Logistics/Transportation , Retail , Insurance etc. Now I want to form groups, for example the group Consumer which should contain Retail, Food/Beverages, Consumer but with the command generate Consumer = Consumer Retail Food/Beverages it doesn't work. Does anyone know what the right command would be? Thanks!

Answer 1

You can use user-written string recode command strrec :

ssc install strrec
strrec Branche ("Consumer" "Retail" "Food/Beverage" = 1 "Consumer"), gen(trunk)

You will need to add additional categories as you see fit. This creates a new variable, trunk, that has labeled integer(s).

You can refer to particular trunks like this:

list if trunk == 1
list if trunk == "Consumer":trunk

The reason I used an integer with value labels rather than a string is that some of the panel data commands do not like string IDs. I am guessing you are headed that route.