https://theconversation.com/what-makes-a-city-tick-designing-the-urban-dma-67227 Created Wed, 02/11/2016 - 06:06 Updated Wed, 02/11/2016 - 06:06 We’re still in the early days of understanding how cities work. But we do know that creative, healthy and productive cities have certain things in common – and it’s all to do with their ‘urban DMA’.