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st: RV: Doubt about level option in pscore.ado


From   Carlos Tendilla González <carlos.tendilla@imss.gob.mx>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: RV: Doubt about level option in pscore.ado
Date   Thu, 5 Dec 2013 09:09:57 -0600

Hi,

Can anyone help me please?

Regards,

-----Mensaje original-----
De: Carlos Tendilla González 
Enviado el: miércoles, 04 de diciembre de 2013 10:23 a.m.
Para: 'statalist@hsphsun2.harvard.edu'
Asunto: Doubt about level option in pscore.ado

Dear Statalist,

I am working with pscore.ado, a user written command from Becker and Ichino. 

I want to know exactly what happens when you change the level option, like this:

. pscore totalformal familiar casado edad edad2 hombre escolaridad sector1 sector2 sector3 sector4 sector5 sector6 sector7 sector8 sector9 sector10 sector11 sector12, pscore(ps) blockid(block) level(.1) numblo(10)

. pscore totalformal familiar casado edad edad2 hombre escolaridad sector1 sector2 sector3 sector4 sector5 sector6 sector7 sector8 sector9 sector10 sector11 sector12, pscore(ps) blockid(block) level(.00000001) numblo(10)

I found that when you decrease the level, the balance is better. I think this option decreases the significance level for the p-value of the t-test for equality of means in control and treatment group. So, I should not decrease to much this level. If what I think is right, what is the optimal level of significance?

Regards,

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