I love the technique of catching misdeeds via subtle statistical traces that the bad guys leave. It is extremely hard not to leave a statistical signature when

I love the technique of catching misdeeds via subtle statistical traces that the bad guys leave. It is extremely hard not to leave a statistical signature when you do something bad repeatedly. You leave tracks you have no idea you're leaving. And since it does seem likely that there's a lot of de facto insider trading, I expect there will be more studies of the type described in this article.