> This is fundamental to the economics of goods but it clearly doesn't hold for information.
Right, it is clearly true that pure information has no marginal cost of production. This does not contradict anything I have said. If you think it does, I am afraid that the fault is with your own understanding.
"However, it is a fundamental economic principle that the cost of a good will approach the marginal cost of production."
This is fundamental to the economics of goods but it clearly doesn't hold for information. When I started researching this topic in 1995 it was exactly because I was stuck in that same discontinuity of understanding. Why were people paying for a CD that had a copy of an operating system they could download for free? A goods economist would, like you state, observe that the supply of such CD's was essentially infinite or at least very high, and the marginal cost of producing one very very low, so how could they maintain a market price that was probably 20x their marginal production cost? That price has a component that is clearly not described by classic economics, what was it? In that same store the cost of blank CDRs was pummelled relentlessly by the reduction in marginal production cost. From over $10/CDR disk when things started down to about $0.43/CDR. Why are they pummeled into the ground and not the Linux Distro of the week CDRs?
I started pulling on that thread a long time ago and haven't stopped. Starting with the question, "What gives information value?" Using what I've learned over the years it has helped me understand and analyze things like what does Google sell really? or Why do non-DRMed artistic products make more money than DRMed ones? Or why did CD sales fall faster after Napster shut down? Can you price awareness? Why did "Its a wonderful Life" enjoy greater success after its Copyright lapsed? Etc.