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| From | Christopher Baum <kit.baum@bc.edu> |
| To | "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu> |
| Subject | RE: st: problems with levpet command |
| Date | Thu, 30 Jan 2014 12:05:47 +0000 |
On Jan 30, 2014, at 2:33 AM, Bruno 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. You don't have to do that. Just use tsset firmid year, delta(2) and it will expect that year takes on values two years apart. Also useful if you have data from 5-year plans, 4-year election cycles, etc. Kit Kit Baum Professor of Economics and Social Work, Boston College, Chestnut Hill MA, USA DIW Research Professor, Department of Macroeconomics, DIW Berlin, Berlin, Germany baum@bc.edu | http://ideas.repec.org/e/pba1.html * * 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/