Top 10 cities with the most powerful economies

So what cities are the most economically powerful? Florida developed The Global Economic Power Index to rank cities based on economic output or gross regional product, banking and financial power, and innovation

Here are the top 10 most powerful economic cities:

1. Tokyo (above)

2. New York

3. London

4. Chicago

5. Paris

6. Boston

7. Hong Kong

8. Osaka

10. (Tie) Washington D.C.

10. (Tie) Seoul