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..., 23-40 > which refers back to: <29. Pfeffermann, D. , and LaVange, L. (1989), ``Regression models for stratified multi-stage cluster samples'', Analysis of Complex Surveys, 237-260 > If you don't like statistical papers, then see section 4.5 of <8. Korn, Edward Lee , and Graubard, Barry I. (1999), ``Analysis of health surveys'', John Wiley & Sons (New York; Chichester) > They explain the idea of using weights in a model fairly simply. Bob -----Original Message----- From: Han-Lin Lai [mailto:Han-Lin.Lai at noaa.gov] Sent: Wednesday, May 19, 2004 12:47 PM...

Dear All, I have a complex survey data with observations having differing probabilities of selection into the sample. I would like to run a linear mixed effects model and also to use weighting that takes this into consideration. As far as I know, however, the weighting option for the lme command from nlme package (or glmmPQL from MASS, for that matter) is related to heteroscedasticity. Is there a

...but without solution. I know there IS instructions by the author of yags, but I just couldn't figured out. I know gee and geepack can also perform generalized estimating equation, but the reason why I need yags is I want to perform a Small Sample Adjustments by Michael P. Fay and Barry I. Graubard in Biometrics, 2001, 57: 1198-1206. I'm working on some dental data (I'm a dentist) with repeat measurements on relatively small sample sizes (around 20 to 50 teeth), and GEE seems to be quite ineffient (i.e. less powerful) compared to other methods. I wonder it is really due to the sa...

I'm trying to learn how to calibrate/postStratify/rake survey data in preparation for a large survey effort we're about to embark upon. As a working example, I have results from a small survey of ~650 respondents, ~90 response fields each. I'm trying to learn how to (properly?) apply the aforementioned functions. My data are from a bus on board survey. The expansion in the

...29. Pfeffermann, D. , and LaVange, L. (1989), ``Regression models for >>stratified multi-stage cluster samples'', Analysis of Complex Surveys, >>237-260 > >> >>If you don't like statistical papers, then see section 4.5 of <8. Korn, >>Edward Lee , and Graubard, Barry I. (1999), ``Analysis of health surveys'', >>John Wiley & Sons (New York; Chichester) > They explain the idea of using >>weights in a model fairly simply. >> >>Bob >> >> >>-----Original Message----- >>From: Han-Lin Lai [mailto:H...

I am trying to use the LME package to run a multilevel logistic model using the following code: ------------------------------------------------------------------------ ------------------------------------------- Model1 = GLMM(WEAP ~ TSRAT2 , random = ~1 | GROUP , family = binomial, na.action = na.omit ) ------------------------------------------------------------------------

Dear List: I am working to understand some differences between the results of the svymean() function in the survey package and from code I have written myself. The results from svymean() also agree with results I get from SAS proc surveymeans, so, this suggests I am misunderstanding something. I am never comfortable with "I did what the software" does mentality, so I am working to