now i'm getting an error because there is no "polact" variable. also, the code you gave me yields an error too... Kosuke -- Department of Politics Princeton University http://imai.princeton.edu On Tue, 3 Mar 2009, Casey Klofstad wrote: > Sorry, here's the code for that: > > ds1$econview <- (ds1$q18+ds1$q19+ds1$q20)/3 > ds2$econview <- (ds2$q18+ds2$q19+ds2$q20)/3 > ds3$econview <- (ds3$q18+ds3$q19+ds3$q20)/3 > ds4$econview <- (ds4$q18+ds4$q19+ds4$q20)/3 > ds5$econview <- (ds5$q18+ds5$q19+ds5$q20)/3 > > Also, I've attached the entire code file I've been using in case I > forgot to add any other variables to the truncated version I sent you. > > Thanks! > > -c > > On Mon, Mar 2, 2009 at 10:37 PM, Kosuke Imai &lt;kimai(a)princeton.edu&gt; > wrote: >> >> I started looking at this but I get an error because there is no >> "econview" >> in ds5. >> >> Kosuke >> >> -- >> Department of Politics >> Princeton University >> http://imai.princeton.edu >> >> On Wed, 25 Feb 2009, Casey Klofstad wrote: >> >>> Here you go. The zip file contains 5 imputed data sets and a code >>> file. The code file takes you though matching to the analysis >>> problems. I'm sure I've just missed soemthing obvious, but who knows. >>> >>> Thanks VERY much! >>> >>> Best, >>> >>> -c >>> >>> On Wed, Feb 25, 2009 at 5:08 PM, Kosuke Imai &lt;kimai(a)princeton.edu&gt; >>> wrote: >>>> >>>> hmmm... can you send me the data set if you don't mind? also a few >>>> lines >>>> of >>>> your code so that I can replicate your error? >>>> >>>> Thanks, >>>> Kosuke >>>> >>>> -- >>>> Department of Politics >>>> Princeton University >>>> http://imai.princeton.edu >>>> >>>> On Wed, 25 Feb 2009, Casey Klofstad wrote: >>>> >>>>> I just tried this and I get the same error: >>>>> >>>>> Error in model.frame.default(formula = polact ~ treat, data = list(X >>>>> = >>>>> 1:2399,  : >>>>>  variable lengths differ (found for '(weights)') >>>>> >>>>> Best, >>>>> >>>>> -c >>>>> >>>>> On Tue, Feb 24, 2009 at 5:13 PM, Kosuke Imai &lt;kimai(a)princeton.edu&gt; >>>>> wrote: >>>>>> >>>>>> Can you try paste this and then run the negbin model you had a >>>>>> trouble >>>>>> with? >>>>>> >>>>>> zelig2negbin <- function(formula, model, data, M, ...) { >>>>>>  mf <- match.call(expand.dots = TRUE) >>>>>>  mf$model <- mf$M <- mf$robust <- NULL >>>>>>  mf[[1]] <- MASS::glm.nb >>>>>>  if (is.character(mf$weights)) >>>>>>    mf$weights <- as.name(mf$weights) >>>>>>  as.call(mf) >>>>>> } >>>>>> >>>>>> Thanks, >>>>>> Kosuke >>>>>> >>>>>> -- >>>>>> Department of Politics >>>>>> Princeton University >>>>>> http://imai.princeton.edu >>>>>> >>>>>> On Tue, 24 Feb 2009, Casey Klofstad wrote: >>>>>> >>>>>>> Hey Kosuke- >>>>>>> >>>>>>> Thanks for the response. >>>>>>> >>>>>>> I tried this and I still get the same error with just one ds. >>>>>>> Also, >>>>>>> I >>>>>>> note that I have the same problem with negbin, but not poisson. >>>>>>> >>>>>>> ??!?!? >>>>>>> >>>>>>> Best, >>>>>>> >>>>>>> -c >>>>>>> >>>>>>> On Tue, Feb 24, 2009 at 3:56 PM, Kosuke Imai &lt;kimai(a)princeton.edu&gt; >>>>>>> wrote: >>>>>>>> >>>>>>>> Does the same command work on one of the imputed data sets >>>>>>>> without >>>>>>>> mi()? >>>>>>>> >>>>>>>> Kosuke >>>>>>>> >>>>>>>> -- >>>>>>>> Department of Politics >>>>>>>> Princeton University >>>>>>>> http://imai.princeton.edu >>>>>>>> >>>>>>>> On Tue, 24 Feb 2009, Casey Klofstad wrote: >>>>>>>> >>>>>>>>> Hey all- >>>>>>>>> >>>>>>>>> I posted the below onthe Zelig discussion board, but I think >>>>>>>>> this >>>>>>>>> might also be related to MatchIt: >>>>>>>>> >>>>>>>>> I just weighted some data, and am trying to examine the results >>>>>>>>> with >>>>>>>>> ordered logit. The code is: >>>>>>>>> >>>>>>>>> z.out <- zelig(as.factor(polact) ~ treat, weights="weights", >>>>>>>>> data >>>>>>>>> = >>>>>>>>> mi(ds1, ds2, ds3, ds4, ds5), model = "ologit") >>>>>>>>> >>>>>>>>> This produces the error: >>>>>>>>> >>>>>>>>> Error in model.frame.default(formula = as.factor(polact) ~ >>>>>>>>> treat, >>>>>>>>> data >>>>>>>>> = >>>>>>>>> list( : >>>>>>>>> variable lengths differ (found for '(weights)') >>>>>>>>> >>>>>>>>> The same weighted model above runs fine in OLS, and I am running >>>>>>>>> MatchIt Version 2.4-10 (downloaded from Gary King's website). >>>>>>>>> >>>>>>>>> Thoughts? >>>>>>>>> >>>>>>>>> Thanks much, >>>>>>>>> >>>>>>>>> -c >>>>>>>>> >>>>>>>>> >>>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>> >>>>> >>>>> >>>>> >>>> >>> >>> >>> >> > > >