Why the urban poor will be forced to leave big cities

Simon Kuper: this 'exodus' could reshape city life for years to come. "When urbanites first lost their jobs this spring, many sat it out hoping for a swift recovery. Now it’s clear that low-wage industries like tourism, restaurants, bars, shopping and the arts (a big employer of the bohemian proletariat) won’t revive anytime soon. If you lose your job in a small town you can probably afford to stay put, but not in premium cities." In his Financial Times column, he contemplates.