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Thread: Increasing variables decreases DFs?

  1. #1

    Increasing variables decreases DFs?




    I'm sorry if this is a total noob question, but I cannot figure it out. When I'm adding variables into my regression into STATA, the degrees of freedom (and observations) decreases significantly. In particular, adding one variable decreases them by about 1,000. I am only looking at the same 6 variables and when I start with 2 and go to 6, I lose DF. I'm using the General Social Survey if that helps.

    Something has to be weird with the variables but I have no clue what is going on. I shouldn't have LESS data points from adding variables?

    Does anyone have any ideas?

    Thank you!

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    Re: Increasing variables decreases DFs?

    Do you have missing values in your data?
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    Re: Increasing variables decreases DFs?


    Quote Originally Posted by Dason View Post
    Do you have missing values in your data?
    Yes I do, but they have a period in front of them so I thought that meant that STATA would ignore them in the regression analysis?

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