Dear Statalisters,

I am struggling with a task in which I want to investigate how an additional variable (i.e., human rights) affects my regression results.

My regression model is as follows:

Code:
regress DV IV HR
where DV represents dependent variable; IV represents independent variables. Human rights is my key explanatory variable and I am interested in looking at how human rights affects the explanation of my results.

Task:

1. Generate a set of predictions for a model in which I use all the explanatory variables except human rights with the coefficients estimated over the whole sample.
Code:
regress DV IV
Code:
predict foreignaid
2. Compare these predictions with the regressions fitted values (which take into account all the predictors including human rights)
Code:
regress DV IV HR


3. Calculate the % difference between the first two measures to see how much of the dependent variable is explained by the human rights.

Now, I am struggling with the second and third step in Stata. I am also wondering whether my codes for the first two steps are okay.

Any help will be appreciated.

Best regards,
Shazmeen Maroof.