It's not just cities; it's also ways to do things. So one region is doing German-style operation, another one US-style, another one Italian-style etc. as close

It's not just cities; it's also ways to do things. So one region is doing German-style operation, another one US-style, another one Italian-style etc. as close as they can reproduce it. The same for education. Then they evaluate what works where and why and adjust/spread the winner.