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| From | Maarten Buis <maartenlbuis@gmail.com> |
| To | statalist@hsphsun2.harvard.edu |
| Subject | Re: st: Xtreg, fe Error: insufficient observation |
| Date | Wed, 10 Jul 2013 10:32:31 +0200 |
On Tue, Jul 9, 2013 at 6:23 PM, Tate wrote: > When I write the command: > xtreg flu_i_tot stock_t1 u_dest gini old_dep_ra c_lav l_prod pileu > s_prot_exp, fe, if stato==10 & stato==5 & stato==6 & stato==13 > Stata gives me the error message insufficient observation. The problem is your -if- condition. As you have written it now an observation is included if it is simultaneously from state 10, 5, 6, and 13, and obviously no observation meets that criterium and 0 observations is not quite sufficient to estimate an -xtreg- model, which is what the error message complaints about. You could replace -&- (and) with -|- (or), or write that -if- condition as -if inlist(stato, 10, 5, 6, 13)-. Hope this helps, Maarten --------------------------------- Maarten L. Buis WZB Reichpietschufer 50 10785 Berlin Germany http://www.maartenbuis.nl --------------------------------- * * 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/