NBER Working Papers May 2007 HKS Authors See citation below for complete author information. Edward Glaeser Fred and Eleanor Glimp Professor of Economics, FAS Citation Cutler, David M., Edward L. Glaeser, and Jacob L. Vigdor. "When Are Ghettos Bad? Lessons from Immigrant Segregation in the United States." NBER Working Papers w13082, May 2007.