Originally posted by telerion
I don't think a high-speed rail train fits the definition of a public good.
It is both rivalrous and excludable.
Now high-speed rail does provide a social externality by reducing pollution. Moreover for short commutes one could argue that the reduced pollution (from not having traffic blocked up on a 100 mile stretch of interstate) offsets the ad ...[text shortened]... yway. The government sector is shrinking and there is little political support for a PWP.
You’re right, of course, I was conflating public goods with the question of whether or not factors such as externalities make it more efficient for some goods and services to be publically provided. For high speed rail systems (setting aside their desirability on other grounds) to be left to the market to provide, I think would present some significant problems. First of all, there would be property-rights questions with regard to routing, that could make it very costly at the least, to put together efficient (in the practical sense) routes. Second, private ownership would have to be of sufficient lengths of route to prevent having some “start-and-stop” toll-pay system between tracks of separate ownership that would defeat the purpose.* For example, a particular high-speed connection might make sense between two hubs only if a particular third hub was also included; and maintenance costs might also diminish to scale over a significant distance. In any event, there are likely to be some barriers to entry on the basis of practical scale.
As far as infrastructure questions, similar issues might affect, say, rebuilding large-scale sewer systems over urban areas—as well as bridges and highways, as you note.
Surely there have been empirical studies that can be relied upon, at least in terms of general issues? In any event, to paraphrase something I think that Samuelson said: Surely there are things worth some inefficiency (assuming he meant in the economic/Paretian sense) to do, as opposed to not doing.
Thanks, Tel.
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* In addition to such a system simply defeating the purpose of high-speed rail, it imposes transaction costs on the section owners to exclude free-riders (pun intended) from one section to another. Although, it may be rivalrous and excludable, I’m not sure that there would not be significant costs to enforcing excludability (e.g., monitoring costs as transaction costs).