R help - Apr 2014 - Tobit model with panel data

Hi all,

I just started to work with R a couple of weeks ago. Right now I would like
to regress an independent variable on a couple of explanatory variables. The
dependent variable is left censored in the sense that all negative values
and zero are set equal to one. This is done because I want to take the
logarithm which, as you all know, is only defined for values bigger than
zero. 

However, what I don't know now is how to compute this on R. Does anybody
know how to proceed? I already checked 
http://cran.r-project.org/web/packages/censReg/vignettes/censReg.pdf
<http://cran.r-project.org/web/packages/censReg/vignettes/censReg.pdf>  
but
I am not able to apply the commands shown on page 8 correctly on my data
set.

Hence, I would really appreciate if somebody could give me a step-by-step
instruction for my own dataset.



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Hi Phil

On 30 April 2014 23:06, phil <quijote at gmx.net>
wrote:
> I just started to work with R a couple of weeks ago. Right now I would like
> to regress an independent variable on a couple of explanatory variables.
The
> dependent variable is left censored in the sense that all negative values
> and zero are set equal to one.
That is most likely not a suitable data transformation.
> This is done because I want to take the logarithm which, as you all know,
> is only defined for values bigger than zero.
>
> However, what I don't know now is how to compute this on R. Does
anybody
> know how to proceed? I already checked
> http://cran.r-project.org/web/packages/censReg/vignettes/censReg.pdf
>
<http://cran.r-project.org/web/packages/censReg/vignettes/censReg.pdf>  
but
> I am not able to apply the commands shown on page 8 correctly on my data
> set.
>
> Hence, I would really appreciate if somebody could give me a step-by-step
> instruction for my own dataset.
1st step: load the data set into R (see
http://cran.r-project.org/doc/manuals/r-release/R-data.html)

2nd step: use pdata.frame() or plm.data() to specify the panel
structure (see http://www.jstatsoft.org/v27/i02/)

3rd step: use censReg() to estimate the model (see
http://cran.r-project.org/web/packages/censReg/vignettes/censReg.pdf)

Please do read the posting guide http://www.R-project.org/posting-guide.html

Best regards,
Arne

-- 
Arne Henningsen
http://www.arne-henningsen.name