st: selection techique

[vinkwai wong <0034058@fudan.edu.cn>]

hi,al,
   
   i want to use some criterion to selecte my regression model.and i can get aic,bis,etc.
but i also wanna to get mallows' Cp and PRESS criterion.but it seems stata has not command to get it.is it true? or just i don't know.anyone tell tell me?
   thank you!

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