How to predict when a system is about to collapse

Predicting when a complex system will go through a sudden change is hard — either you need vast swathes of information, or you make rather bad predictions. But we want to spot critical transitions before they happen, regardless of whether we're talking about irreversible damage to coral reefs, stock market crashes,… » 2/03/12 1:14pm 2/03/12 1:14pm