A decade ago many Chicago neighborhoods were undergoing massive transformations. Condos were replacing old factories, new homes were springing up in abandoned rail-yards, the city was tearing down public housing to make way for mixed-income communities. Then came the housing crash and the Great Recession. The gap between affluent and poor neighborhoods grew while the number of middle-class neighborhoods diminished. Although much attention has been given to neighborhood upgrading, or gentrification, decline is more prevalent in the city as a whole. Are we ignoring the trend of disinvestment? To kick off our series “There Goes the Neighborhood” we talk with Janet Smith from University of Illinois, Chicago’s Nathalie P. Voorhees Center for Neighborhood and Community Improvement about which neighborhoods are seeing the most change, and WBEZ’s Chris Hagen breaks down the numbers of where residential and commercial real estate saw growth and decline. And we take your calls: How has your neighborhood changed?