I am kind of shocked (yet not shocked) at how limited Haier's thinking is. This is why ivy tower theories don't work in the real world. As someone in the trenches, I don't need a study to prove to me that goodness of fit is the key to solve the puzzle of maximizing intelligence. It makes evolutionary sense that we all have highly individualistic IQs. There is no institution or program  that can  "fix all the things."  Studies show that attachment in early childhood leads to better outcomes. Unfortunately, we do not all end up developing in our ideal environment. We don't all get our ideal teacher, our ideal society or even our ideal parents.  I've dealt with a wide variety of children in a very wide variety of environments. including in China.  Goodness of fit is the ONLY stable factor, when it comes to a successful student. Let me clarify, MY ideal educational environment will not match everyone else's. In fact, it may be entirely unique. If there are any studies being conducted, with the goal of improving educational outcomes as a society, it needs to be how to  tailor education to fit each individual student. Personally, I think that would be impossible. It takes a highly sensitive parent and or educator to study a child over a long period of time to determine what they need to maximize their potential.,(reply>), Thanks for commenting. You are absolutely right.