With the New Orleans Pelicans in the midst of coaching search, it's meaningful to do and look at a number of studies. One important aspect is to examine player improvement. Although this article admits its far from perfect, the data gives a general idea of how well players' performances progressed under their respected coaches.
Have a look at how well Jeff Van Gundy and Tom Thibodeau rank in comparison to their peers. Meanwhile, Mark Jackson's ranking will probably surprise you while Alvin Gentry will have you running for the hills.