# st: RE: calculating number of bimesters

 From "Nick Cox" To Subject st: RE: calculating number of bimesters Date Tue, 16 Dec 2008 17:34:03 -0000

```I guess that bimester 1 = Jan-Feb, 2 = Mar-Apr, ..., 6 = Nov-Dec.

Then

gen year0 = cond(phase < 3, 2002, 2004)
gen bimester0 = cond(phase < 3, phase + 3, cond(phase == 3, 2, phase))
gen mytime = 6 * (year - year0) + (bimester - bimester0) + 1

Nick
n.j.cox@durham.ac.uk

By the way, Rodrigo: You started a thread on 4 December

<http://www.hsph.harvard.edu/cgi-bin/lwgate/STATALIST/archives/statalist.0812/date/article-221.html>

-- and David Elliott and I posted various replies, raising subsidiary questions, but I never saw any reply from you.

Rodrigo Briceño

I need to calculate the amount of bimesters a
household stay in a program. For that purpose I have three different
variables:
1. Phase of incorporation (phase): it has 6 numeric values where
1=july-august 2002, 2=sep-oct 2002, 3=mar-apr 2004, 4=jul-aug 2004,
5=sep-oct 2004, and 6=nov-dic 2004
2. Two variables that contain the information about the time the
household dropped the program:
2. 1 Year: from 2002 to 2008
2. 2 bimester: from 1 to 6

In what way can I calculate the amount of bimesters (or months) that a
household stayed in the program? Example above (time is the variable
which values I need):

HH  phase  year    bimester  time
1      3         2007       2         19 (or 38 months)
2      1         2004       1          10 (or 20 months)

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