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Originally Posted by Standpoor
What a bunch of patronizing bs. The CTA system is mostly fixed costs associated with service levels. You said that "true" cost of each individual new rider is $.73 but your math is not accurate. Are you actually saying that if my cousin comes to town, it costs the CTA $.73 for him to ride compared to if he did not ride.
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You either didn't read what I wrote or you're intentionally creating a straw man. I said very clearly - this is a direct quote - "The incremental cost of adding 1 rider is negligible."
Quote:
Originally Posted by Standpoor
Fixed costs=/=marginal cost. All I am saying is that the marginal cost of each new rider is ridiculously small, so the CTA should try and run with as many people on the trains as possible. It is like flying standby on airlines. Once the plane leaves the airport, its costs are set so you might as well get somebody in the seat, even if their fare is low.
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I'm not really sure what that statement has to do with the discussion. Nobody's saying the CTA shouldn't get more people to ride, but when you have crush loading at times when a lot of people wish to ride, or increment between scheduled runs is long enough to discourage choice riders, then adding service to increase ridership makes sense.
Quote:
Originally Posted by Standpoor
Nor can you just divide $16 by 22 to get marginal costs. The increased service will be used by new riders, old riders, and will run empty sometime, it will not be solely attributable to new riders. You cannot say that those new riders add $.73 of costs per rider. That $16 million dollars is fixed. It will be spent whether ridership increases or decreases. It will be spent whether it is new riders or old riders. Average total cost was $2.05 per rider in 2011. It is my belief that average fixed costs per rider is much closer to $2.05 then it is to $1.32.
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If you actually read what I wrote, I never said that each rider, by himself, cost 73 cents. What I said was, "The incremental cost of adding, say, 1 ride per week for every pass-holder in the system is millions of dollars per year." That's obviously a statement about cumulative impact, and it's very disingenuous of you to pretend otherwise.
If you want an example, you're right, adding one stand-by passenger to an airplane costs the airline a few dozen dollars in fuel and other consumables. But if you have a million passengers every day, the airline is either going to have standby passengers who don't get to fly and will never even try to fly on that airline again, or they at least plan to start adding planes, which costs a lot more than a few dozen dollars per passenger. In other words, to repeat myself for the fourth (and last, even if you still don't get the concept): just because the incremental cost for 1 person is effectively zero doesn't mean that the incremental cost for a million people is still zero. It will be magnitudes higher, in nearly all cases. One extra visitor to NYTimes.com costs effectively zero. One million incremental monthly visitors to the NYTimes probably costs something on the order of an extra dime per user, allocated across all the new incremental users. That's just the way these things work.
Quote:
Originally Posted by Standpoor
... increases off peak when the line runs 4 cars, I will not believe that this change is necessitated by increased ridership.
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Obviously none of us really know, but increased frequency makes choice riders more likely to ride because their total trip time cost (on average) goes down.