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Re: IPV4 as a Commodity for Profit
On Feb 23, 2008, at 1:54 PM, Stephen Sprunk wrote:
Thus spake "Tom Vest" <[email protected]>I agree, to a point. My prediction is that when the handful of
Thanks for the information Stephen.
In order to be perfectly clear on how to interpret this, it would be good to know whether this sum includes the pre-ARIN delegations, or just reflects what has happened since ARIN was established.
Then, if the distribution is deemed to be of real significance, e.g., to understand the past, or better understand what to do next, the best/simplest metric for such evaluations is probably the Herfindahl- Hirschman Index (HHI), which attempts to capture both dimensions of concentration/diffusion in a single unidimensional scale. This is probably the most common tool that economists and policymakers use to evaluate such things when necessary (e.g., before approving very large mergers) in other sectors.
The standard interpretations for HHI results may not be ideal for this sector, but if one has access to time series data, it does provide a really nice way of evaluating concentration/diffusion trends over time. To my mind, concerns about the distribution of PA are pretty analogous to concerns about the distribution of access to goods in general, while PA+PI together could be interpreted as the distribution of final goods themselves (e.g., think airports or airlines vs. individual passenger-flights). Since we're not talking about goods that are strongly bound to geography, the fact that ARIN members don't all "compete" for the same kinds of customers or over the same market territories doesn't really matter, as it would in more conventional contexts.
More on HHI here: http://en.wikipedia.org/wiki/Herfindahl_index
Bottom line: if people believe that the kind of de facto concentration/diffusion claims that have been circulating are important, a bit more effort should probably be devoted to understanding how to sensibly interpret such things.
If there is, is this 90% figure a new development, or rather the product