events keep overtaking our understanding of the world. my understanding of coal, built around coalgate, is now obsolete. and one of the new areas to now focus on is ppps in coal. incidentally, for more on the three models i discuss in this story, see these stories, on the 51:49 model; on the 74:26/emta model; and the subcontracted mdo model. (Update: After joining Scroll, I looked at another company following the MDO model. See these three reports. One, Two and Three).