[R] in R when I get negative adjusted R^2 using "lm", what might be the problem?

From: Michael <comtech.usa_at_gmail.com>
Date: Sun, 09 Nov 2008 17:36:38 -0800


This is a linear regression of Y onto factors...

If I take log of Y, and regress onto the factors, I got:

Multiple R-squared: 0.4023, Adjusted R-squared: 0.2731

If I don't take log of Y, and directly regress Y onto the factors, I got:

Multiple R-squared: 0.1807, Adjusted R-squared: -0.001112

Is this negative adjusted R^2 a problem?

What observation can I make here and what might be the problem?

Thanks!



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