Summer day 49 complete - Finally wrapping up the first section of the results, and also made a very small dent on the discussion.  Here is my most recent figure (still incomplete), to show you where my head has been!  On the docket for tomorrow: results for polycentricity, and something on land use specialization...
 

Figure 6.  Changes in population density for Chengdu, Xi'an, Kunming and Urumqi, China.