Public Transit Subsidies and Efficiency
A few days ago, Streetsblog covered a new study about the impact of transit subsidies on efficiency. Transportation economics research is skeptical of operating subsidies to public transit, arguing that it incentivizes waste. In contrast, the new study argues, the opposite is the case: systems with more subsidies are more efficient. In reality, this is a bad study – trivially and uninterestingly wrong. The real question of interest is not whether it is saying something – it isn’t – but why it is getting any positive press among transit advocates. The context here is important: non-technical advocates, having given up on building good transit, instead just want more subsidies for operations, as the costs rise (bus service being labor-intensive), with scant interest in outcomes like ridership.
What’s in the study?
The study, by Funk, Higgins, and Newmark, is a regression among the top 15 American metro areas, using data from 2016-9. Among those regions, higher subsidies to public transit correlate with higher efficiency. Efficiency is measured as average vehicle occupancy, regardless of whether the vehicle is a train or bus (but trains are calculated on a per-car basis, following NTD norms). Subsidies are measured per capita.
By Funk-Higgins-Newmark, New York has by far the most transit subsidies in the United States: the region subsidized public transit operations across all agencies by $444.50/capita in 2019 dollars. In contrast, regions that have rounding-error ridership were stingier: Dallas averaged $124.20/capita, and Phoenix $97.20. New York has much higher efficiency measured by vehicle occupancy, and secondary transit cities like Boston and San Francisco have lower efficiency than New York and higher than the no-transit Sunbelt cities.
Except that all they’re proving is that cities with higher transit ridership have both higher vehicle occupancy (partly due to higher crowding, partly due to real efficiency, because they run more trains and not just buses) and higher subsidies per capita. To switch to raw 2019 NTD data just because it’s easier to explain: the MTA, across all sub-agencies recorded in the NTD’s top 50 database linked above, spent $12.381 billion on operations in 2019 and earned just $6.359 billion from fares, which works out to somewhat more than $400 per capita in the MTA service region – but those $6 billion of subsidies covered something like 30 billion p-km and 4.6 billion unlinked trips, working out to $1.3 per trip. Even taking into account that unlinked trips are fake news (they double-count people who transfer between subway lines, even within the system), the subsidy per ride is on the on the order of $2/trip. Dallas, in contrast, spent $568 million on operations, got $66 million in fare revenue, and carried 69 million unlinked trips and 706 million p-km. Far from stingy, Dallas spent $7.28 on subsidizing each unlinked bus or rail trip. Houston likewise spent $5.65/trip and Phoenix (buses only) $4.33.
At no point does the study try to establish that if Dallas quadruples its transit subsidies, it will be able to raise its transit ridership by the factor of 67 required to match New York per capita. A snapshot regression of 15 metro areas has no chance of having enough statistical power to establish anything on the margin. The literature review is negative on transit subsidies, finding that they are associated with higher labor spending (for example, through reluctance to innovate in labor-saving technology) and with spreading service-hours too thinly at too low a frequency. To the contrary, all available research suggests that an increase in Dallas’s transit subsidy to match New York will just get wasted; ridership will increase, but so far below the increase in subsidy that the per trip subsidy will skyrocket even more.
In other words, the higher subsidy in New York per capita just showcases that a larger share of people in the New York region ride public transit, and therefore even a relatively low per-rider subsidy can amount to a hefty subsidy per resident. This is not at all surprising; by the same token, polities with larger numbers of schoolchildren spend a larger proportion of their economy on education, which says nothing about how well-funded the schools are (for example, Israel has a rather high education spending as a percentage of GDP, but low spending per student). Thus the study is not just wrong but also boringly so.
So why is it getting any positive press?
American advocacy and subsidies
For years, American transit advocates have been looking into the idea of federal subsidies to transit operations. Traditionally, these are not allowed, except in very small cities with even less relevant public transit than the systems of Dallas or Phoenix; instead, federal funding only goes to capital construction. In the Streetsblog piece, Kea Wilson writes about this connection to advocacy for federal subsidies; I’ve seen it from talking to advocates, who kept complaining, essentially, that federal subsidies require some clear piece of infrastructure to be built and that’s too constraining.
As corona hit, these efforts grew dramatically, since in an emergency it was valuable to inject cash into the systems to prevent long-term closures; then, as ridership hasn’t quite returned (it looks like 70% of pre-pandemic levels as of late 2023; in Berlin, with large reductions in fares, it was 95%), advocates started agitating for more subsidies, without much of a clear goal, certainly nothing related to outcomes. Instead, the demand is to have buses and trains run just so that cities can say that they’re running them. When such advocates say what they’d like to do with the money, it’s, in my experience, always about inputs, never outputs; one said that light rail trains should have a second crew member working as a train attendant just to make passengers feel safer.
In contrast, when I see advocates demand subsidies for concrete ridership-related improvements, it’s not really connected to any demand for federal subsidies. I don’t know what Riders Alliance thinks about federal subsidies to operations, but in its Six-Minute Service campaign, which in its opinion requires some additional state subsidies (and in mine and in that of ETA pays for itself on the subway), it talks about how it’s such a small increase in subsidy relative to existing ones, and doesn’t directly ask for federal subsidies. When it’s for something this specific, advocacy organizations feel confident asking for money directly.
So the belief that subsidies to operations help efficiency, based on a boringly wrong regression, is there in support of something different – in support of wanting subsidies with no clear goal, other than “fund transit.” It’s not really about frequent service, the most valid use of additional operating funds. It’s certainly not about capital extensions that reduce future operating costs, which are favored under the current regime. It’s about spending for its own sake.





