In practice, cities with dense populations and high economic values benefit, while rural areas with fewer homes and businesses do not. (newscientist.com)
Medical assistant salaries tend to be higher in more technologically advanced cities with older, more dense populations, because demand and costs of living are high, and more specialization is required. (medicalassistants.net)
Choice works best when there's a relatively dense population, with a relatively large number of schools, relatively close to each other. (bluum.org)