A lot of Chicago's population loss is on the South Side where violence is high. Also the elimination of the projects has moved a lot of Section 8 housing to the suburbs, as it gives low income families a chance at a better life in a less dire situation. Investment in new infrastructure is at an all time high in the Loop / North / West sides. Young people are moving out the suburbs and into the core. Chicago's population isn't increasing at the rate of places like Houston because of the lack of annexation, the suburbs in Cook County generally don't want to join the city.
