comparison between tort and regulation from the efficiency point

it is a basic question in law with the aim to regulate conducts that how tort and regulatory law could have interaction to reach that aim. in this regard it is clear that they have fundamental difference in both goals and functions and the choice of law makers is to evaluate them differently and internally. but they could be seen in a coherent system of conduct regulation, in which the tort and regulation are comprised from the points of efficiency. in this evaluation costs, public awareness, international harmonization, etc. shall be considered. in conclusion we reach the point that it is necessary for our system of law that it is not a strict thing to say tort is better than regulation or vice versa but we need a coherent system that in each case we shall choose between these two.