I’m using IPUMS international, specifically for South Africa and Brazil. I’m doing household level analysis so using wthh. My questions are- which type of weight should I be using in Stata (it can not be frequency weight, because the weights are not integers). aweight? pweight?

The second question-do I still use weights in the same way when dealing with subgroups- for example, I am looking at households headed by blacks only in South Africa for some of my analysis. Does it make sense to apply the weights when calculating statistics for only this subgroup?

Thank you.