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st: Changing spells to person-years
Hello trusty listservers,
I have spell that that I want to convert into a long file. Using a life history calendar, I have below four people who show changing residences (rural/urban) across their life course. Each row represents one person. For instance, person 1 lived in a rural area from 0-3, an urban area from 4-6, rural from 7-15, and urban 16-20. That person at the time of the survey was 20 years old. Person 3 lived in a rural area her whole life.
cw2i1 cw2i1s cw2i1e cw2i2 cw2i2s cw2i2e cw2i3 cw2i3s cw2i3e cw2i4 cw2i4s cw2i4e
rural 0 3 urban 4 6 rural 7 15 urban 16 20
urban 0 30 rural 31 32 . . . . . .
rural 0 38 . . . . . . . . .
urban 0 17 rural 18 54 urban 55 57 . . .
While I have shown how it looks for residence location, the same exists for education and other variables. I know I could generate hundreds and hundreds of new variables so that each cell in the calendar represents a variable in STATA, but from reading the listserv, it seems that there is an easier way, although it is not clear to me. How can I turn this into a person-year file?
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