The article discusses this in some detail. Some of the districts with high profits are “downtown” areas as you say. Some are “poor” or “bad” neighborhoods, cont

The article discusses this in some detail. Some of the districts with high profits are “downtown” areas as you say. Some are “poor” or “bad” neighborhoods, contrary to your (and I suspect most people’s) intuition. The article’s main thesis is that these poor areas have the best ROI for development.