Australian economist Nicholas Gruen, working at the dangerous space in between economics and policy, puts my pop-science brain through boot camp, which I always appreciate, and tells me why complexity science and systems thinking are policy fads that won't last beyond the next election cycle. He talks me through a paper of his that I really love. Only problem is he hasn't published it yet, so if you want to get a preview, you have to ask him nicely like I did. The password is "We need the eggs". ngruen@lateraleconomics.com.au