is it fine to add too many data points on stata why do you have too many controls in stata why do stata control errors appear when too many controls are added in stata what happens why do i get an ols error if i add one more control why is it happening to add too many controls in stata why too many controls in stata which stata command has too many controls? why is there too much control in stata stata how many controls why is there too many controls in stata how many controls does stata have what if too many controls why do stata use too many controls what is the problem with too many controls in stata why is x = f in stata how many control are there in stata? how to add too many controls stata what is stata's control limit used for why is there so many controls in stata