It’s not an exaggeration: It really is getting harder to move up in America. Those who make very little money in their first jobs will probably still be making very little decades later, and those who start off making middle-class wages have similarly limited paths. Only those who start out at the top are likely to continue making good money throughout their working lives. That’s the conclusion of a new paper by Michael D. Carr and Emily E. Wiemers, two economists at the University of Massachusetts in Boston. In the paper, Carr and Wiemers used earnings data to measure how fluidly people move up and down the income ... (full story)