Hi everybody, I have some troubles by using R with weighted data. It is very easy to obtain the mean of a weighted data set due to the function weighted.mean, but unfortunately, such a function is not available for any other estimators. Is there a comfortable way to consider the column with the weights which would not lead to an expansion of the sample (what would apply by using the rep() command). To put it more generally: I'm looking for a nice way to use most of the social science samples. Thanks in advance. P.S. Such a sample looks like Income Children Age Sex Weight 5000 2 29 1 5874 6000 3 28 2 584 5500 0 32 1 8513 6951 1 23 1 510 Salvatore salvatore barbaro department of public economics platz der g?ttinger sieben 3 37073 g?ttingen tel.: +49 551 3919704 fax: +49 551 39 7353 http://www.gwdg.de/~sbarbar