Back during the mid-1960's, the investment tax credit in effect at the time played a substantial role in encoraging many railroads to replace their original diesels bought in the 1950's with "second-generation" models
The incentive is a credit, in other words, a direct offset of taxes due, in exchange for investing retained earnings into new plant or equipment. At the time mentined in the previous paragraph, Federal corporate income txes were somewhat higher, but some roads (Jersey Central was a good example) had operated in the red for so long that threre were no taxes to offset. In CNJ's case some new GP-35 delivered in 1966 bore a strong resemblance to the power of parent Baltimore & Ohio, so I suspect that parent B&O bought the Geeps and leased them
Remember, most railroad property is both fixed and dedicated to a particular use. It can't be sold, moved or converted to another use if the political climate changes.
What a revoltin' development this is! (William Bendix)