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RE: st: problems with levpet command
From
"Skrinjaric Bruno" <[email protected]>
To
<[email protected]>
Subject
RE: st: problems with levpet command
Date
Tue, 28 Jan 2014 11:40:06 +0100
. d id year
variable storage display value
name type format label variable label
------------------------------------------------------------------------
--------
id long %10.0g id of the firm
year int %9.0g year
. destring id year,replace
id already numeric; no replace
year already numeric; no replace
No, that's still not it. I have removed zero values in hope of resolving
this problem, but it didn't work.
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Nick Cox
Sent: Tuesday, January 28, 2014 11:21 AM
To: [email protected]
Subject: Re: st: problems with levpet command
You've not told us about -id- and -year-. -levpet- requires a numeric
panel identifier.
If -id- is string, then use -encode-.
(Removing zero values: why did you do that?)
Nick
[email protected]
On 28 January 2014 09:59, Skrinjaric Bruno <[email protected]> wrote:
> Thanks for quick reply. When I do -describe- this is what I get...
>
> . describe lnrva lnl lnrm lnrk
>
> variable storage display value
> name type format label variable label
> ----------------------------------------------------------------------
> --
> --------
> lnrva float %9.0g Ln of
> Real VA, deflated by
>
> sectoral deflator
> lnl float %9.0g Ln of
> labour
> lnrm float %9.0g Ln of
> Real material costs,
>
> deflated by GDP deflator
> lnrk float %9.0g Ln of
> Real capital stock, deflated
> by
> GDP deflator
>
>
> Even if I try to destring it, it says they are already numeric...
>
> . destring lnrva lnl lnrm lnrk, replace force lnrva already numeric;
> no replace lnl already numeric; no replace lnrm already numeric; no
> replace lnrk already numeric; no replace
>
> I still do not know what to do.
>
>
> -----Original Message-----
> From: [email protected]
> [mailto:[email protected]] On Behalf Of Nick Cox
> Sent: Tuesday, January 28, 2014 10:38 AM
> To: [email protected]
> Subject: Re: st: problems with levpet command
>
> This often means that some variable that should be numeric is really
> string. Look carefully at the results of -describe- on the variables
> you are using and try using -destring-.
>
> Nick
> [email protected]
>
>
> On 28 January 2014 09:31, Skrinjaric Bruno <[email protected]>
wrote:
>
>> I have only recently started using Stata and I came across a project
>> where I have to use levpet command. I have downloaded st060 (SJ-4-2)
>> and installed it.
>>
>> I want to use the following command:
>>
>> . levpet lnrva, free(lnl) proxy(lnrm) capital(lnrk) i(id) t(year)
>> valueadded
>>
>> However I always get to following error:
>>
>> no observations
>> r(2000);
>>
>> I am very sure I have all the observations for the variables I am
> using.
>> I am doing this for every sector according to NACE 1-digit
>> classification and the number of observations ranges from 25 - 1125
>> across different sectors.
>> But I removed all missing values, and also all zero values. All
>> variables are in float format.
>>
>> I have also read the help file, but I cannot find the solution to my
>> problem.
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