Outliers - urgent plz

#1
Sir,

i am new at using stata. I want to winsorized at the 1% and 99% levels in order to minimize the effect of outliers.

I have many variables. like

y = a + b1 X1 + b2 X2 + b3X3 +b4X4 +....+b12X12 + error

where b is beta

Please guide me is there any way that i can remove outliers.

Regards

S.Franck
 

bukharin

RoboStataRaptor
#2
It might be worth having a look at Nick Cox's -winsor- command, eg:
Code:
ssc describe winsor
+/-
ssc install winsor
 
#3
The extremes command of Nick Cox shows the bottom 5 and top 5 outliers. I had many observations and I wanted to check the observations first to see if there were any data problems. Maybe it can be useful for you too.