gen wgt = weight_all *** weight_all = v005/1000000(Total number of households during each survey year/sample households in each survey) and append three surveys data gen psu = cluster *** each survey clusters are unique eg. 2007_1, 2011_1 and so on svyset psu, weight(wgt) strata(strat) , singleunit(centered) || _n *** each survey strata are unique
svy: logit y x Number of strata = 63 Number of obs = 19,896 Number of PSUs = 1,561 Population size = 44,882,311