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From |
"Austin Nichols" <austinnichols@gmail.com> |

To |
statalist@hsphsun2.harvard.edu |

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

Date |
Fri, 7 Nov 2008 09:42:05 -0500 |

That example seems to work fine. What exactly are you looking for in that example that you don't see? On Fri, Nov 7, 2008 at 8:50 AM, Erasmo Giambona <e.giambona@gmail.com> wrote: > 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/

**Follow-Ups**:**Re: st: e(sample) not working after XTIVREG2***From:*"Erasmo Giambona" <e.giambona@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>

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

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