What right was management exerting at carnegies steel plant?

They focused on the right in determining  wages and workhours.
The carniege steel never really have any relevant competitors because they managed to obtain monopoly in the industry.
Because of this, the workers of this industry of did not have any other job options other than following the policies by carniege.

Fine until slavery ya ya haha

Americans agreed to the settlement terms established by the mexican government.