This is excellent and informative work.  And, to be honest, the value of Eurotrib -- I doubt that I would have ever considered / seen anything about this without this community.  And, I value that.  Thank you.

A question ... taking it to today ... How does the explosion of information technology and reduced price for it change the value/approach of tiered/zone pricing?  It makes it far easier to play with timed prices and be far more specific in terms of those prices without overburdening the train / railroad employees while maximizing (potentially revenue) while likely confusing (at least some) riders.  Your thoughts?

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