by tovarichpeter ➕follow (6) 💰tip ignore
http://phys.org/news/2013-06-cities.html
Santa Fe Institute showed that when the population of a city doubles, economic productivity goes up by an average of 130 percent. Not only does total productivity increase with increased population, but so does per-capita productivity.
http://phys.org/news/2013-06-cities.html