http://blog.cacvantage.com/2014/01/defending-three.html
Based on some of the work done by Ian Levy at Hickory High: http://www.hickory-high.com/?page_id=6155 but looking at a defensive expected points per shot on threes based on shot defense.
Unfortunately, I think I'll be putting the final defensive XPPS (looking at all shots and not just threes) on hold to explore some other more interesting research (the value of screen setting for example). But I'll post the final results at some point.