Re: st: Multiple Imputation and other Missing Data

[Marcello Pagano <pagano@hsph.harvard.edu>]

Dear Groves,

I don't know about the ethics of putting your name on the authorship 
list when
you don't understand what is going on in the paper, but I leave that to 
others
to judge.  My question has to do with your choice of subjects which includes
only those who show up twice.  This excludes all those who only showed up
at the first visit?  That bias I would want to explore.

m.p.


Groves wrote:


> Dear list,
>
> I'm hoping that one or more of you can take a minute or two to skim 
> through
> the following several paragraphs and provide some feedback to someone
> marginally familiar with statistics in general (and missing data 
> techniques
> in particular) about whether these paragraphs make any sense and whether
> they provide any indication about the knowledge level of their author.
>
> A student wrote these paragraphs in an attempt to summarize the 
> methods he
> used to conduct a longitudinal analysis purportedly employing some 
> type of
> advanced missing data technique. These paragraphs were intended for
> publication on a jointly authored manuscript, and thus my desire to make
> certain that they are reasonably accurate. .......
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