[R] "Within" model in plm package: is the reported R-squared correct?

Bert Gunter bgunter.4567 at gmail.com
Tue Feb 20 21:58:18 CET 2018

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Bert Gunter

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On Tue, Feb 20, 2018 at 11:44 AM, Dung Nguyen <dungnguyen.ivi at gmail.com>

> Hi everyone,
> I am doing panel data analysis using the 'plm' package. However, I have
> noticed that the plm() function reports a different value of R-squared from
> the R-squared of the lm() function with time-demeaned data. To be clear, I
> have tried to compute the within model both manually (run an OLS regression
> with time-demeaned data using lm()) and by using plm(). The two methods
> give me 2 different values of R-squared and I am not sure which one is the
> correct one for the fixed-effect estimation.
> I am new to R and panel data analysis thus it will be so great if someone
> can explain the difference to me.
> Thank you in advance.
> Bests,
> MiYung
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