Hi.. I have four countries cross section data in my sample. i regressed separate regression for each country and 3 pooled countries also. I wanted to know if i want to regress 2 countries what would be the suitable command in the end of regression equation? Fo example i have sepal, Bhuttan,Sri Lanka and India in my regression and i want to regress only nepal and bhuttan what i will type.
Secondly how to run chow test for theses countries for comparison?