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RE: st: RE: Pscore command


From   "Colette.Grey" <[email protected]>
To   <[email protected]>
Subject   RE: st: RE: Pscore command
Date   Fri, 12 Nov 2010 13:25:55 -0000

Thanks Nyasha.

-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Nyasha Tirivayi
Sent: 12 November 2010 12:04
To: [email protected]
Subject: Re: st: RE: Pscore command

Hi Colette

Pscore automatically calculates if the balancing property is
satisfied. Check example here
http://www.stata-journal.com/sjpdf.html?articlenum=st0026

Nyasha


On Fri, Nov 12, 2010 at 12:53 PM, Colette.Grey <[email protected]> wrote:
> Hi,
>
> Do you mind me asking how you tested that the balancing score was
> satisfied?
>
> Thanks, Colette
>
> -----Original Message-----
> From: [email protected]
> [mailto:[email protected]] On Behalf Of Nyasha
> Tirivayi
> Sent: 12 November 2010 11:47
> To: [email protected]
> Subject: st: Pscore command
>
> Hello
>
> I used the pscore command for propensity score matching. The balancing
> property was satisfied after the model had 14 covariates (from a start
> point of 20, pasmatch2 also balances with less covariates). Someone
> has said these covariates are not enough to satisfy the conditional
> independence assumption. Is there a minimum number of covariates
> needed in propensity score matching?
>
> Kindly advise
>
> Nyasha
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