Note 37 — Chapter II · THE THEORY OF RAILROAD RATES
Reading edition
For an instance of detailed analysis of cost, the general investigation of soft coal rates to the lakes in 1912 is highly suggestive. Two-thirds of revenue went for operation and maintenance, one-third for return upon plant. This was the first attempt to justify an advance in rates for a large volume of traffic on the ground that it did not contribute its proportionate share of earnings. 22 I.C.C. Rep., 604.