I have estimated WLS manually by dividing each of the coefficients by income^0.5. My question is, when I do that, does it automatically divde the constant by income^0.5? If not, how would I add 1/income^0.5 for the constant? Would I just create a variable for 1/income^2 and then add it to the matrix where I have all of my coefficents? Any help you could give would be greatly appreciated!