It was assumed that the price of wagons moved with the wholesale price index (Historical Statistics,. pp. 200, 201). The weights applied were: labor, 0.44; teams, 0.40; wagons, 0.16. Cf. Fogel, , Railroads,. p. 72 Google Scholar. If the 1906 wagon rates are projected backward to 1859 on the basis of the index of input prices, we obtain an 1859