Probably the single best article I saw recently was this: http://www.offconvex.org/2017/12/08/generalization1/ http://www.offconvex.org/2017/12/08/generalizatio

Probably the single best article I saw recently was this: http://www.offconvex.org/2017/12/08/generalization1/ http://www.offconvex.org/2017/12/08/generalization1/ I think that blog post references most of the relevant papers as well, but if not, check the sibling comments I've made.