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Re: st: How to calculate weighted mean


From   Nick Cox <njcoxstata@gmail.com>
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   Re: st: How to calculate weighted mean
Date   Thu, 5 Dec 2013 18:52:40 +0000

Anthony guessed right, but for future questions please note that

This is my code ... and this is what went wrong ... .

is immensely more helpful than just

My code seems to be not working.

Nick
njcoxstata@gmail.com


On 5 December 2013 18:41, Xixi Lin <winnielxx@gmail.com> wrote:
> Thanks, Anthony.
>
> And thanks, Nick.
>
> That solves my problem!
>
> Best,
> Xixi Lin
>
> On Thu, Dec 5, 2013 at 1:36 PM, Thomas, Anthony
> <anthony_h_thomas@brown.edu> wrote:
>> Yep, egen can have multiple variables in the "by" option. They should
>> be separated with a space though (not a comma as in the example
>> above). Also options are separated by spaces as well, not commas.
>>
>> Anthony
>>
>> On Thu, Dec 5, 2013 at 1:31 PM, Xixi Lin <winnielxx@gmail.com> wrote:
>>> 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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