Not all cities are equal. Cities have different structures, different demographic make-up, different competitive advantages, and different sizes. Yet, the salient features of these cities – a system of production, distribution and consumption, infrastructure for connecting people, resources and markets, and economies of scale they create, may be similar. All cities provide a reason for people to be in that city but the reasons are different. To make meaningful policy decisions, then, it is important to classify these cities in a way that can allow for such varying reasons to be recognized as well as the ability of the government to provide for these reasons and needs. Having a logical classification of cities then can also help better design or modify policy to best suit the purposes and needs of a group of cities.