I have a small sample that is also stratified. Would it be reasonable (more strictly, would it be valid) to calculated standard errors for each strata separately using the bootstrapping method and then to combine the strata results using population weights for the sample standard error? I would then want to use the sample standard error to extrapolatie a total amount for the population with a confidence interval. Or, does the bootstrapping method need to construct many stratified samples from the actual stratified sample? If so, is there a template code for stratified bootstrapping available? Thanks for any response - thoughts, how-to's, cautionary notes, etc.