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| From | Alexandra Gecker <agecker@princeton.edu> |
| To | statalist@hsphsun2.harvard.edu |
| Subject | Re: st: Standard deviation with pweight or fweight |
| Date | Mon, 26 Mar 2012 20:39:10 -0400 |
Thank you! I am using -reg- for the regression given when I do not include fixed effects. To include fixed effects I use -areg- with the option absorb(school). If I need to provide any other clarification please let me know!! ----- Alexandra Gecker '12 804-387-1323 (cell) On Mon, Mar 26, 2012 at 8:33 PM, Nick Cox <njcoxstata@gmail.com> wrote: > You don't say what command you are using. > > It sounds as if you want aweights. Your data are on schools, not > students as such. > > Nick > > On Tue, Mar 27, 2012 at 1:29 AM, Alexandra Gecker <agecker@princeton.edu> wrote: > >> I have a dataset in which each observation is a school i in a year t. >> Each observation includes a dependent variable "y_it" and several >> covariates "x_it" as well as information on the total school >> enrollment. In essence, I want to regress y_it on x1_it, x2_it, x3_it >> -- but I want to do so weighting each school by the enrollment. So at >> first I thought I would use [fweight=school], but that created a huge >> number of observations and therefore very "over-confident" p-values. >> >> So now I have two questions: >> (1) if I use fweight, can I ensure correct standard deviations and >> p-values by using the option vce(cluster school)? and (2) if not, >> could I use pweight=p_it, where p_it is just the (enrollment in school >> i in year t)/(total enrollment across all schools in year t)? >> >> Thank you so much for your consideration. >> >> Best, >> Alex >> * >> * 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/ * * 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/