By: Mark Glennon* One particular piece of bragging in the offering materials** for Chicago’s upcoming bond sale caught my attention. No, it wasn’t any of the silly ones like “stable population and business base” or “proven record of implementing reforms.” And, no, it wasn’t any of the obvious ones like “commitment to raising revenues.” It was this one: “gaining high income households rapidly, rising median family income.” That seems harmless on its face, but what’s it really saying? Let’s think about it remembering that the city’s population is declining and factor in some other recent news. It’s not something self-styled