st: svyset and complex design

[BRINGE Arnaud <bringe@ined.fr>]

Hello,


I want to specify my sample design which is following :

First stage : Sampling of district proportional to size
Second stage : Sampling of households, stratified according to the 
presence of migrants in the households (Yes/No), unequal probiblities
Third stage : Sampling of Individuals, stratified according to his 
migrant status (Migrant return, Migrant conjoint, No migrant). Up to 2 
migrant return and migrant conjoint, and 1 random No migrant if present 
in the household.

I have two questions :
1) How to specify the first level is sampled proportional to size (PPS)  ?
2) I tried to specify this design with svyset instruction. Is it correct ?


svyset num_dr [pweight=weight_ctry], strata(Strata_area) fpc(t) || 
n_menage, strata(Strata_hh) /// 	
fpc(pmig) singleunit(centered) || _n, strata(statu_mig) fpc(pmig_i)


with num_dr= District identification
weight_ctry=sample weighting
t= Probability of sampling districts
n_menage=Household identification
Strata_hh = Presence of a migrant in the household
statu_mig= Migrant status of individual
pmig= Sampling probability for one household
pmig_i = Sampling probability for one individual





Thanks.


Arnaud
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