The report uses the graphic shown below to illustrate this potential impact (assumes service is the same for all modes, not true of course but valid for this comparison).
In the first scenario, Mode B uses $125 in resources to ship the package; Mode A uses $100 in resources. In this case, price accurately reflects costs incurred to provide the freight service for both modes. Looking to minimize expenses, the shipper makes the logical decision and chooses the less expensive option (Mode A). The freight service provider represented by Mode A is rewarded for providing service more efficiently than the competitor, and the $25 of resources that otherwise would have been used if the product were shipped by Mode B can be used more efficiently in other ways to produce benefits for society.
In scenario 2, the government provides a subsidy to Mode B, enabling it to charge a price that is $50 below its marginal costs. As in the first scenario, the shipper selects the lower-priced option; however, in this case the subsidy results in the service being provided by the higher-cost producer. As a result, $25 of resources that otherwise could have been used to provide other societal benefits are not used efficiently.
The third scenario shows how external costs can distort competition and reduce economic efficiency in a manner similar to government subsidies. In this scenario, Mode B generates $50 in external costs that are not reflected in the price charged to the shipper. The fact that these costs are not passed on to the shipper makes Mode B more competitive than it would be if it had to include those costs in the price. Consequently, the shipper chooses Mode B, despite the fact that society bears $25 more in costs than if the other mode had provided the service.
Devil is in the Details
The report primarily relies on data from the 2000-2007 time frame, augmented by interviews with experts in the US Department of Transportation (DOT) and Environmental Protection Agency (EPA) as well as others inside and outside the government.
What is perhaps most interesting is the breakdown of the "unpriced" costs. The report says there are $66,000 in total "marginal costs" for the trucking industry, meaning costs associated with each mile of moving freight, offset by $11,000 in revenue coming to the government from taxes and fees.
However, of the $66,000 total costs, $59,000 are associated with "societal costs" - trucking taxes and fees actually exceed costs for road maintenance and such.
• $44,000 for pollution (using EPA estimates)
• $8000 for accidents
• $7000 for congestion
The report notes that the GAO estimate for the cost of pollution from trucks is probably understated as it is, and does not include costs for some other emissions that could be considered, including CO2.
The unpriced costs for trucking for fixed infrastructure investments for trucking are much lower - just $7000 per million ton miles. Together, the $55,000 in marginal unpriced costs and $7000 in unpriced fixed costs lead the $62,000 in total unpriced costs cited above.
The report's conclusion is that these unpriced costs lead both to general tax payers bearing a greater cost than they would if these costs were appropriately priced into the mode, and that as noted above it may be leading to distortions in modal usage and private and public investment.
It notes though there are complicating issues, including measurement of social costs, issues of "fairness," (say road development in rural areas), and challenges with how to price fixed investments in infrastructure.
The report also says that "Ideally, policy that is able to align marginal prices with marginal costs on a shipment-by-shipment basis would provide the greatest economic benefit. However, achieving this in practice would typically result in high administrative costs," and thus is not really practical.
The report was not really meant to provide a solution, only an analysis of the costs, but clearly the implication is thathat is needed are increases diesel fuel taxes and other fees, primarily for trucking, to cover this unpriced cost gap. Whether Congress would attempt to actually cross that chasm, especially when so a high percentage of the unpriced costs related to social costs, remains to be seen.
We expect this discussion is far from over.
What is your reaction to this GAO analysis? Is trucking not paying its fair share of total social costs? Do you think the sociall costs estimates are fair or should be used? How do you see this playing out? Let us know your thoughts at the Feedback button below.
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