Several of us have been working on an essay to describe more fully than an earlier post here, a theory of urban heterogeneity. That essay is not complete yet, but it is mature enough to share with the BES community for purposed of this meeting.
It is entitled "Dynamic Heterogeneity as a Framework to Promote Ecological Integration
and Hypothesis Generation in Urban Systems." It is not ready for reposting or citation, so just use it for internal BES purposes now.
You can find it on Dropbox at https://www.dropbox.com/s/ur7tynfh8aljtai/A%20Theory%20of%20Urban%20Heterogeneity%20Text%20V12.docx?dl=0