The Metroverse is a project created by folks at Harvard that will tell you many things about any major city in the world, including:

What is the economic composition of my city?
How does my city compare to cities around the globe?
Which cities look most like mine?
What are the technological capabilities that underpin my city’s current economy?
Which growth and diversification paths does that suggest for the future?
You might also be interested in The Best Tools For Analyzing Census Data.