Thanks, TokyoTom.

Silas, well said. I note that Bob Murphy has linked to this post.

And now a commenter on Scott Sumner's blog mentioned this. I'm gonna be famous! :-P (Btw, any plans for allowing more profile information so we post our email and websites if we want?)

BTW, while I agree that Hamermesh's experiment showed the difficulty of collusion in a free market, I doubt that was his intended "point".

I was saying the opposite: in his post, Hamermesh is saying that this game shows why collusion is difficult, but it doesn't capture the mechanism by which it makes collusion difficult.