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Re: st: How to calculate weighted mean


From   Xixi Lin <winnielxx@gmail.com>
To   statalist <statalist@hsphsun2.harvard.edu>
Subject   Re: st: How to calculate weighted mean
Date   Thu, 5 Dec 2013 13:31:04 -0500

Hi Nick,

Thanks for pointing this out. Btw, is it possible for egen to both run
by country and by period? My code seems to be not working that way.

Best,
Xixi Lin

On Thu, Dec 5, 2013 at 1:12 PM, Nick Cox <njcoxstata@gmail.com> wrote:
> That is a user-written program from SSC. You need to install it using
>
> . ssc inst _gwtmean
>
>
> Nick
> njcoxstata@gmail.com
>
>
> On 5 December 2013 18:07, Xixi Lin <winnielxx@gmail.com> wrote:
>> Hi,
>>
>> I am trying to calculate weighted average return by country and by
>> period. Here is my code:
>> egen capweight_return = wtmean(Return_lead1), weight(Market_Cap),
>> by(Country, Period)
>>
>> But the stata says "unknown egen function wtmean()", does anyone knows
>> how to fix that?
>>
>> Thanks.
>>
>> Best,
>> Xixi Lin
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