[R-sig-ME] Standard errors of group-wise random effect intercepts

[Jacob Bukoski]

Hi Thierry,

Your suggestion is very helpful. Thanks!

Jacob

On Wed, Nov 18, 2015 at 11:46 AM, Thierry Onkelinx <thierry.onkelinx at inbo.be
> wrote:

> Dear Jacob,
>
> If you are willing to which to lme4, then you can use ranef(lme1, condVar
> = TRUE). See its helpfile for the details.
>
> Best regards,
>
> ir. Thierry Onkelinx
> Instituut voor natuur- en bosonderzoek / Research Institute for Nature and
> Forest
> team Biometrie & Kwaliteitszorg / team Biometrics & Quality Assurance
> Kliniekstraat 25
> 1070 Anderlecht
> Belgium
>
> To call in the statistician after the experiment is done may be no more
> than asking him to perform a post-mortem examination: he may be able to say
> what the experiment died of. ~ Sir Ronald Aylmer Fisher
> The plural of anecdote is not data. ~ Roger Brinner
> The combination of some data and an aching desire for an answer does not
> ensure that a reasonable answer can be extracted from a given body of data.
> ~ John Tukey
>
> 2015-11-18 17:34 GMT+01:00 Jacob Bukoski <jbukoski1 at gmail.com>:
>
>> Hi all,
>>
>> I might be searching for something that doesn't exist -- but is there a
>> way
>> to obtain group-specific standard errors for random effect intercept
>> estimates?
>>
>> I have hierarchical data grouped by "site," for which I've generated
>> unique
>> intercept coefficients. For example:
>>
>> $random$Site
>>           (Intercept)
>> ab      -9.574204
>> am     -9.149834
>> ay      -2.238734
>> br        5.073831
>> ...
>>
>> Is there a way to extract some sort of confidence interval on these
>> values?
>> I have attempted using VarCorr(), but am having trouble getting it to
>> return a standard error beyond that of the standard error across *all*
>> site
>> intercept estimates.
>>
>> If it helps, my model is specified as:
>>
>> lme1 <- lme(Biomass ~ Basal.area*Latitude - Latitude -1,
>>             random = ~1|Site, method="REML")
>>
>> ​Many kind thanks,
>> Jacob​
>>
>> --
>> Jacob J. Bukoski
>> Master of Environmental Science Candidate, 2016
>> School of Forestry and Environmental Studies, Yale University
>> jbukoski1 at gmail.com | jacob.bukoski at yale.edu | LinkedIn
>> <
>> https://www.linkedin.com/profile/view?id=AAIAAAdWVW8BMzqU_2EGNbEkyuy8O7K1Jyhd8ps&trk=nav_responsive_tab_profile_pic
>> >
>>
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>>
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>
>
>


-- 
Jacob J. Bukoski
Master of Environmental Science Candidate, 2016
School of Forestry and Environmental Studies, Yale University
jbukoski1 at gmail.com | jacob.bukoski at yale.edu | LinkedIn
<https://www.linkedin.com/profile/view?id=AAIAAAdWVW8BMzqU_2EGNbEkyuy8O7K1Jyhd8ps&trk=nav_responsive_tab_profile_pic>

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