antipooling

Antipooling refers to legal prohibitions and regulatory measures designed to prevent competing railroads from forming associations or agreements that divide traffic, fix rates, or share revenues. These associations, called pools, allowed rival carriers to act as a unified entity and eliminate price competition on routes where multiple lines operated in parallel. An antipooling statute forbids such arrangements and enforces independent competition instead.

The practice of pooling became common in American railroads during the 1870s and 1880s, when operators of competing lines discovered they could stabilize earnings by agreeing to split freight or passenger traffic in fixed proportions, regardless of actual competitive performance. A railroad might agree to handle 40 percent of westbound grain shipments from Chicago while its rival took 60 percent, with revenues pooled and distributed according to the formula. This eliminated the incentive for either line to cut rates or improve service to win business from the other.

The Interstate Commerce Act of 1887 included explicit antipooling language that prohibited common carriers engaged in interstate commerce from entering into any agreement, pool, or contract to divide traffic or fix rates. Similar provisions appeared in state railroad commissions and subsequent federal legislation. The antipooling clause was understood as foundational to the regulatory framework because it prevented railroads from circumventing rate regulation simply by pooling revenues outside the official tariff system.

Antipooling rules created enforcement challenges. Railroad managers could achieve pooling effects through informal understandings or through subsidiary arrangements that nominally complied with the letter of the law while violating its purpose. Regulators therefore developed detailed reporting requirements and monitored patterns of pricing and traffic allocation for evidence of disguised pooling agreements. Penalties included fines, loss of operating authority, and in serious cases, criminal prosecution of individual officers.

Antipooling doctrine persisted as a cornerstone of railroad regulation for over a century, even after railroads themselves declined in competitive significance. The term survives in regulatory texts and historical analysis of early American antitrust policy, where it represents one of the first attempts by government to prevent oligopolistic coordination through explicit contractual prohibition rather than through breakup of dominant firms.