John Robb points out that students of terrorists networks have discovered they’re directed scale-free networks. That is, communication isn’t always two-way; often there’s much more communication in one direction between two people than in another. In particular, one person may be a hub who talks to many people, but each of those other people may have little to say back.

This seems familiar somehow; oh; yes: it’s like USENET. Anyway, it seems good risk management to understand what sort of network you’re dealing with.

-jsq