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Re: st: problems with levpet command
From
Nick Cox <[email protected]>
To
"[email protected]" <[email protected]>
Subject
Re: st: problems with levpet command
Date
Tue, 28 Jan 2014 11:27:09 +0000
OK. I think now that your problem must be something specific to
-levpet-. I am out of advice because I've never used it and don't know
anything about its precise assumptions, but
. set trace on
before -levpet- would show where the program fails. If you show the
results, someone may be able to give advice.
Nick
[email protected]
On 28 January 2014 11:19, Skrinjaric Bruno <[email protected]> wrote:
> Here it is...
>
> . summarize lnrva lnl lnrm lnrk id year
>
> Variable | Obs Mean Std. Dev. Min Max
> -------------+--------------------------------------------------------
> lnrva | 1047 17,20429 2,074527 8,822554 23,24413
> lnl | 1047 4,766175 1,732232 0 9,194313
> lnrm | 1047 17,24891 2,236354 8,082948 23,6598
> lnrk | 1047 16,8549 2,405058 7,859804 23,52634
> id | 1047 2549185 1011692 154288 3964248
> -------------+--------------------------------------------------------
> year | 1047 2009,975 1,627722 2008 2012
>
>
> -----Original Message-----
> From: [email protected]
> [mailto:[email protected]] On Behalf Of Nick Cox
> Sent: Tuesday, January 28, 2014 11:52 AM
> To: [email protected]
> Subject: Re: st: problems with levpet command
>
> You should only remove zeros with good reason, and you have not given
> one.
>
> On this evidence, you really do have missings, despite your denial.
> Show us the results of
>
> . summarize lnrva lnl lnrm lnrk id year
>
> Nick
> [email protected]
>
>
> On 28 January 2014 10:40, Skrinjaric Bruno <[email protected]> wrote:
>> . 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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>>
>> *
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