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From |
"Erasmo Giambona" <e.giambona@gmail.com> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: e(sample) not working after XTIVREG2 |

Date |
Fri, 7 Nov 2008 14:50:39 +0100 |

Thanks very much Austin. I think this code is very close to what I need but not completely. Indeed, I have l1. RHS variables. Therefore, I modified your code as follows: webuse grunfeld, clear drop if time>2 & company==10 xtivreg2 mvalue l1.invest, fe g s=e(sample) egen c=count(s), by(company) g ok=s*(c>2) tab company ok Things seem to work well in your example, but not in my case. This is perhaps happening because my panel is unbalanced? Any suggestions on what I should do in this case Thanks, Erasmo On Fri, Nov 7, 2008 at 1:55 PM, Austin Nichols <austinnichols@gmail.com> wrote: > Erasmo Giambona <e.giambona@gmail.com> : > Do you want something like this? > > webuse grunfeld, clear > drop if time>1 & company==10 > xtivreg2 mvalue invest, fe > g s=e(sample) > egen c=count(s), by(company) > g ok=s*(c>1) > tab company ok > > Note that -xtivreg2- is on SSC, and e(sample) works as expected when > using the -fd- option. > > On Fri, Nov 7, 2008 at 6:22 AM, Erasmo Giambona <e.giambona@gmail.com> wrote: >> Dear Prof. Schaffer and Statalisters, >> >> For some reasons, e(sample) does not seem to work after XTIVREG2. In >> particular, if I run XTIVREG2 some observations are not used because >> they are singleton (likely due to the fact that some of my RHS >> variables are lagged 1 period relative to the dependent variable). >> However, If I try to calculate summary statistics with the e(sample) >> option (i.e., sum ...... if e(sample)), the singleton observations are >> now used again. I contacted STATA Support about it. They cannot >> explain why this happens and suggests that I contact you. >> >> I would appreciate if you or any Statalisters could suggest how I >> could fix this problem. > * > * For searches and help try: > * http://www.stata.com/help.cgi?search > * http://www.stata.com/support/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/statalist/faq * http://www.ats.ucla.edu/stat/stata/

**Follow-Ups**:**Re: st: e(sample) not working after XTIVREG2***From:*"Austin Nichols" <austinnichols@gmail.com>

**References**:**st: e(sample) not working after XTIVREG2***From:*"Erasmo Giambona" <e.giambona@gmail.com>

**Re: st: e(sample) not working after XTIVREG2***From:*"Austin Nichols" <austinnichols@gmail.com>

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