Here is an economics paper from Nature that might also add to the discussion. http://www.nature.com/srep/2014/140121/srep03784/full/srep03784.html http://www.n

Here is an economics paper from Nature that might also add to the discussion. http://www.nature.com/srep/2014/140121/srep03784/full/srep03784.html http://www.nature.com/srep/2014/140121/srep03784/full/srep03... It's worth some orthogonal cross-referencing.