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Hi R, Does the "step" function used to perform stepwise regression has the option to specify the entry/exit significance levels for the independent variables? (This is similar to the 'slentry' and 'slstay' option in 'Proc reg' of SAS.). Or do we have any other package which does the above? Thanks. Thanks and Regards, Shubha This e-mail may contain confidential and/or privileged i...{{dropped:13}}

...evel. Then before any new variables are added variables in the model that not meet F statistics at the significant level will be removed. I have added the SAS syntax for those of familiar with both software packages. SAS syntax: proc reg model Y=x1 x2 x3 .....xn /selection=stepwise slentry=0.50 slstay=0.05; All ideas are appreciated Thanks, Hans Ole ?rka