The original Atlantic article mentioned Pittsburgh as one of the cities in the "sweet spot" for affordability and social mobility. Interestingly, Pennsylvania happens to be the one state that has perhaps gone the furthest in implementing George's proposed land value tax reform (at the local level, mainly). Pittsburgh used a different form of property tax that taxed land at a far higher rate than improvements until 2001, and the Pittsburgh Improvement District (I am unfamiliar with what exactly this entails) still uses a pure land value tax as a surcharge on the city property tax. [https://en.wikipedia.org/wiki/Land_value_tax_in_the_United_S...]