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| From | Nick Cox <njcoxstata@gmail.com> |
| To | "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu> |
| Subject | Re: st: problems with levpet command |
| Date | Wed, 29 Jan 2014 09:40:21 +0000 |
<> Thanks for closing the thread here. Nick njcoxstata@gmail.com On 29 January 2014 08:10, Skrinjaric Bruno <bskrinjaric@eizg.hr> wrote: > OK. I think I got it. Apparently, the problem was that I have panel data > with gaps in time variable, i.e. I have data for years 2008, 2010 and > 2012. > I -recode-d variable year to be without gaps, and then -levpet- works. > > -----Original Message----- > From: owner-statalist@hsphsun2.harvard.edu > [mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Nick Cox > Sent: Tuesday, January 28, 2014 12:27 PM > To: statalist@hsphsun2.harvard.edu > Subject: Re: st: problems with levpet command > > 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 > njcoxstata@gmail.com > > > On 28 January 2014 11:19, Skrinjaric Bruno <bskrinjaric@eizg.hr> 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: owner-statalist@hsphsun2.harvard.edu >> [mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Nick Cox >> Sent: Tuesday, January 28, 2014 11:52 AM >> To: statalist@hsphsun2.harvard.edu >> 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 >> njcoxstata@gmail.com >> >> >> On 28 January 2014 10:40, Skrinjaric Bruno <bskrinjaric@eizg.hr> > 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: owner-statalist@hsphsun2.harvard.edu >>> [mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Nick Cox >>> Sent: Tuesday, January 28, 2014 11:21 AM >>> To: statalist@hsphsun2.harvard.edu >>> 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 >>> njcoxstata@gmail.com >>> >>> >>> On 28 January 2014 09:59, Skrinjaric Bruno <bskrinjaric@eizg.hr> >> 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: 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. >>> * >>> * For searches and help try: >>> * http://www.stata.com/help.cgi?search >>> * http://www.stata.com/support/faqs/resources/statalist-faq/ >>> * http://www.ats.ucla.edu/stat/stata/ >>> >>> * >>> * For searches and help try: >>> * http://www.stata.com/help.cgi?search >>> * http://www.stata.com/support/faqs/resources/statalist-faq/ >>> * http://www.ats.ucla.edu/stat/stata/ >> * >> * For searches and help try: >> * http://www.stata.com/help.cgi?search >> * http://www.stata.com/support/faqs/resources/statalist-faq/ >> * http://www.ats.ucla.edu/stat/stata/ >> >> * >> * For searches and help try: >> * http://www.stata.com/help.cgi?search >> * http://www.stata.com/support/faqs/resources/statalist-faq/ >> * http://www.ats.ucla.edu/stat/stata/ > * > * For searches and help try: > * http://www.stata.com/help.cgi?search > * http://www.stata.com/support/faqs/resources/statalist-faq/ > * http://www.ats.ucla.edu/stat/stata/ > > * > * For searches and help try: > * http://www.stata.com/help.cgi?search > * http://www.stata.com/support/faqs/resources/statalist-faq/ > * http://www.ats.ucla.edu/stat/stata/ * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/faqs/resources/statalist-faq/ * http://www.ats.ucla.edu/stat/stata/