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RE: st: weight option


From   "Sarah Edgington" <sedging@ucla.edu>
To   <statalist@hsphsun2.harvard.edu>
Subject   RE: st: weight option
Date   Thu, 23 Aug 2012 13:39:46 -0700

Tashi,
It sounds like you want something like hits per document, right?  So why not
just create that measure directly by dividing hits by doc_published?
-Sarah

-----Original Message-----
From: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of tashi lama
Sent: Thursday, August 23, 2012 12:50 PM
To: statalist@hsphsun2.harvard.edu
Subject: RE: st: weight option

In my opinion, that would be opposite of what I would like to have. If I use
frequency weights the way you suggested, would it not give more weight to
analysts with higher doc_published(since higher doc_published means higher
frequency) which is opposite of what I want? I want analysts with more
doc_published to have less weight.  I would think may be reciprocal of
fweight. May be something like [fweight=1/doc_published] but stata doesn't
allow non-integer for fweight. Looks like pweight is closer to what I want.
Any ideas?

Thanks
----------------------------------------
> Subject: Re: st: weight option
> To: statalist@hsphsun2.harvard.edu
> From: pablo.bonilla1234@gmail.com
> Date: Thu, 23 Aug 2012 19:38:52 +0000
>
> I would use frequency weights so Stata will understand that your obs are
replicated as many times as the weights says to be.
>
> graph pie hits [fweight=doc_published], over(analyst) ,
>
> Best,
>
> Pablo.
> Sent via BlackBerry from T-Mobile
>
> -----Original Message-----
> From: tashi lama <ltashi32@hotmail.com>
> Sender: owner-statalist@hsphsun2.harvard.edu
> Date: Thu, 23 Aug 2012 19:32:20
> To: <statalist@hsphsun2.harvard.edu>
> Reply-To: statalist@hsphsun2.harvard.eduSubject: st: weight option
>
> Hello all,
>
> The problem is creating a market share of analysts based on the 
> readership views but also that take into account how many documents 
> were published by the analysts. For instance the guy with 20 views on 
> just 2 documents published should have higher market share than the 
> guy who has 25 views on 5 documents published. Say for instance my 
> dataset would look something like this
>
> analyst doc_published hits
> |---------------------------|
> | A 5 25 |
> | B 3 20 |
> | C 1 18 |
> | D 2 20 |
> | E 4 12 |
>
> If I were to draw a pie chart, I would simply do graph pie hits, 
> over(analyst) This will indeed give me a nice looking pie chart but 
> this doesn't take document published (which is in column 2) into account.
However, I want to be able to create a market share of analysts' based on
readership hits but also takes document published into account. I have a
feeling it has to do something with [weight] option. Could someone please
explain which weight should I use and may be why it would be better than
others?
> it could be something like this
> graph pie hits [weight=doc_published], over(analyst)
>
> Thanks,
> Tashi
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