Dear statlisters,
Once more I would like to get your help on deleting
observations. When I run equation 1 below after the
command (bys hhn: drop if _N==1) the minimum number of
observation per group (household (hhn) is two.
However, When I run equation 2 below for the
sub-sample of observations using indicator variable
(sterrace ==1) after the command (bys hhn: drop if
_N==1) the minimum number of observation per group is
one. I was expecting the minimum observation per group
to be more than one. I am not clear why this is
happening. I appreciate any help on this.
1) xtreg lnprovalue sex lnfamysize lnage tlu educ
lnareahh, i(hhn) fe
Number of obs = 1279
Number of groups = 355
Obs per group: min = 2
avg = 3.6
max = 11
2) xtreg lnprovalue sex lnfamysize lnage tlu educ
lnareahh if sterrace ==1, i(hhn) fe
Number of obs = 225
Number of groups = 150
Obs per group: min = 1
avg = 1.5
max = 4
Regards
Menale
--- Maarten buis <[email protected]> wrote:
> bys HHLDid: drop if _N==1
>
> --- menale kassie <[email protected]> wrote:
>> I would
>> like to delete those households who have one plot
> from
>> the list of observations. Below is the data
>> structure.
>>
>> HHLDid Plot
>> 1 1
>> 1 2
>> 1 3
>> 2 1
>> 2 2
>> 3 1
>> etc
>
>
>
>
> -----------------------------------------
> Maarten L. Buis
> Department of Social Research Methodology
> Vrije Universiteit Amsterdam
> Boelelaan 1081
> 1081 HV Amsterdam
> The Netherlands
>
> visiting adress:
> Buitenveldertselaan 3 (Metropolitan), room Z434
>
> +31 20 5986715
>
> http://home.fsw.vu.nl/m.buis/
> -----------------------------------------
>
>
>
>
>
>
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