Which are the top American cities today, how do they rank on a global scale, and what will they be like tomorrow? The answers to these questions can vary from one study to another, depending on the type of data being used. We looked at five studies conducted within the past three years; here, we list the 17 American cities that were included in at least one of the studies. The results, which follow, are sometimes predictable (New York and Los Angeles consistently take top slots, and each survey is dominated by Chinese cities) and often surprising (at home, San Diego and San Jose both hold much future promise; in the world, Lima, Dubai and Jakarta are all up-and-coming).
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