hello，I am in China , so my english is poor.but there are some concept and method confused me ,I am not clear about the singleunit (method) after svy. in stata!! there are four methods which could be choice to deal with the singleton strata, I saw these in the "stata survey data reference manual". And the methods be choiced are missing,certainty,scaled and centered. But which one is the better one to deal with the singleton strata.How can i choice. would you like to help me , thank you so much !!!
