Kista Science City, just north of Stockholm, is Sweden’s version of Silicon Valley. Anchored by a few big firms and a university, it has become northern Europe’s main high-tech center, with housing mixed in so that people live and work in the same general area. Around the globe, a similar pattern is visible in many urban locales. Near MIT, Kendall Square, once home to manufacturing, has become a biotechnology and information technology hub while growing as a residential destination. Hamburg, Germany, has redeveloped part of its famous port with new…
