Hi Stata users, I used xtnbreg and standardized some of the key variables (listcoef does not work for nbreg) and estimated the regression.
Regarding the interpretation of standardized coefficients, I found examples in Long and Reese (page 377-8) but they don't show regressions with interaction terms.
If have a standardized regression with standardized coefficients -0.2 for X1 and -.56 for X1 and X2, will a change of 1 st dev in X1 give the following effect on Y?
-0.2 + 0.56*(X2)
The change of 1 st dev in X2 is this.
1.67 + 0.56*(X1)
Do I assume a value of X1 and X2 in each case, by taking the min and max and calculating the resulting effect?
How do I compare the effects of X1 and X2 on Y if there effects range from a negative value to a positive value?
Will appreciate your explanations and help.
Cheers
Pek
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