RE: st: problems with levpet command

["Skrinjaric Bruno" <bskrinjaric@eizg.hr>]

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: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Nick Cox
Sent: Tuesday, January 28, 2014 10:38 AM
To: statalist@hsphsun2.harvard.edu
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
njcoxstata@gmail.com


On 28 January 2014 09:31, Skrinjaric Bruno <bskrinjaric@eizg.hr> 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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