tage of leaving the Minnesota Railroad and Warehouse Commission free to choose between methods of rate making in specific instances. It is suggested that in those states where any doubt may exist as to the power of the regulatory body to choose between methods of rate making, the Wisconsin statute can be copied with good effect. Administrative discretion should be left free to apply any method which best suits the convenience of the particular case and promises substantial justice to the parties concerned. Freedom of choice under precautionary provisions for appellate review, may permit continued progress in the development of rate making methods, and be perhaps the best public policy in the long