Assuming a regression equation y=a+bx+u. Where, the point of interest is the coefficient of x "b", which is required to regress on some other variable, let's say "z". In this case, can we generate a series for the beta as "b= (y-a-u)/x ", is it statistically/econometrically appropriate to carry on with this? or is there any other way to approach this issue.
Looking forward to your advice.