But they don't have to rely on personal connections to rig the price of potatoes: they do it through a third-party data-broker called Potatotrac. Each cartel member sends all their commercially sensitive data – supply costs, pricing, sales figures – to Potatotrac, and then Potatotrac uses that data to give "advice" to the cartel members about "optimal pricing."

This is the real sick stuff, same with RealPage. They're just offering a service that could allow the businesses they serve to collude, but because they're just doing it through a third party service it's suddenly not collusion.

Doctorow pretty spot on as usual. I'm glad he's come a long way, because I actually kind of disliked his writing on Boing Boing in the early 2000's because he often got some simple facts wrong. He's much more thorough and rigorous now.