st: generating a variable as a subset of a numeric one

["R.E. De Hoyos" <redeho2@hotmail.com>]

I have a 4 or 5-digits numeric variable (format: int) containing information
on state (first 1 or 2 digits) and municipality (remaining 3 digits).

Region
 1001
 1002



32001
32002




I want to create a new dummy variable (North) that takes the value of one if
the state belongs to certain category. I can:

gen North=0
replace North = 1 if Region >1000 | Region < 2000

But I will have to this for each state belonging to category North. I
thought of the -inlist- command, however first I have to create a data set
like the following:

Region      State       Municipality
 1001          1                1
 1002          1                2



32001         32              1
32002         32              2



I don't know how to do this; perhaps is not necessary.

Any suggestions?

Thanks

rafa
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