Propedeutics and Motivation. Urbanisation in developing economies is finally starting to get the recognition that it deserves within the profession. Apart from the recent special issue in the JoUE edited by Glaeser and Henderson (2017), there finally is a paper that provides a theoretical explanation for how poor megacities can come about: Jedwab and Vollrath (n.d.) in the AEJ:Macro (I personally would have loved to see that in a top5 since it is so unique and the first of its kind)1.