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...happen, however, when I run the model using listwise deletion for missing data. Any idea what is happening, or how I can fix it? For those wishing to reproduce the problem, you can download a sample code file and data frame from the following two links. https://fds.duke.edu/db/aas/Sociology/grad/aam34/files/problem%20code.R https://fds.duke.edu/db/aas/Sociology/grad/aam34/files/sampledat.rdata Thanks for your help! Andrew Miles [[alternative HTML version deleted]]

I've noticed that R has a number of very useful functions for obtaining descriptive statistics on groups of variables, including summary {stats}, describe {Hmisc}, and describe {psych}, but none that I have found is able to provided weighted descriptives of subsets of a data set (ex. descriptives for both males and females for age, where accurate results require use of sampling