[gov2001-l] Survey package question

Dear List, I am running a logit model on the following data, and I have truncated my data set (a panel data set with country year as the unit of analysis) from the original 418 country-year observations (rows) to 275 observations (rows). This is the data.4 that I specify in model.4 below: model.4 <- svydesign(ids=idcode, strata=NULL, weights=NULL, data=data.4) However, when I attempt to run the logit model in the survey package, I enter this #Running Model 1 with three individual year lags in DV included multilag.logit1 <- svyglm(dintensity~lag1yr1+lag2yr1+lag3yr1+polity2l+gdpenl+oil+lpop+epop+p9010.prime+provcont+eprovcont+lsbextex+lsgrtex+lsbextex* p9010.prime+epop*p9010.prime+epop*lsgrtex+provcont*eprovcont, design=model.4, family=quasibinomial(link="logit")) and get the following error: Error in `$<-.data.frame`(`*tmp*`, ".survey.prob.weights", value = c( 0.00239234449760766, : replacement has 418 rows, data has 275 I am confused because nothing in my data is 418 rows long any more. Any clue as to what R is trying to tell me? Many thanks, Cat On Sat, Mar 29, 2008 at 1:12 PM, <johns18 at fas.harvard.edu> wrote: -- Catherine Lena Kelly Ph.D. Student Harvard University Department of Government