*****
Pura, I am going to assume that you have svyset your
data properly to
reflect the sampling design. If you need help
with svyset, please ask. (The variable group (or
province) should be
the stratum variable.)
In what follows, I assume that your intervention area
and time
period variables are "group" and "period"
group 1 = control 2 = intervention
period 1= baseline 2 = endline
y response variable
The following code will then work for you.
Good luck!
Steve
/* Code for Pura's Question */
gen gp11= group==1 & period==1
gen gp12= group==1 & period==2
gen gp21= group==2 & period==1
gen gp22= group==2 & period==2
svy: reg y gp11 gp12 gp21 gp22, nocons
lincom (gp22-gp21) // End - Baseline
Group 1
lincom (gp12-gp11) // End - Baseline
Group 2
lincom (gp22-gp21)-(gp12-gp11) // Group
difference
/* ALTERNATELY */
xi: svy: reg y i.group*i.period // __IgroXper_~2
interaction
line will give you the same result as the last lincom
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