| http://www.w3.org/ns/prov#value | - A line of business that is popular, but does not directly increase revenue, is a cost center, no matter how much it pretends not to be.posted by effugas at 1:22 PM on October 1, 2010 for rail the margin on incremental passenger growth is tremendous, or put another way costs barely increase as you get more people on the train.
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