There are alpha cities and beta cities. There are even gamma-minus cities, according to a regular study by the Globalization and World Cities (GaWC) Research Network.
The organization is one of a number of think tanks set up to determine how the planet’s metropolises rank against one another.
Alpha cities have a few characteristics in common, outlined by urban studies scholars, for whom such a place is defined, basically, as a vital part of the global economy.
Also known as "world cities," they should, for example, house a major stock exchange, provide a variety of international financial services and appear near the top of cost of living lists.
So far, so good for Hong Kong. It's ranked "alpha+" together with rivals Singapore and Shanghai. That's second-best to top ranking "alpha++."
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