Here is this week’s installment of urban miscellany:

• The Power of Density: Richard Florida looks at why the geographic concentration of firms, industries, technologies, people, and other economic assets plays a powerful role in innovation and economic growth. (The Atlantic)

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  Clinging to a vision: A look how architect Paolo Soleri’s 40-year endeavor to erect an earth-friendly city at Arcosanti is inspiring ideas to come. (Arizona Republic)

• What Seinfeld Teaches Us About Parking: From an urbanist perspective, Seinfeld highlights a lot of the great things about cities. (Extraordinary Observations)

• Naked: How life in Manhattan is like living inside a gigantic Twitter stream. (The New Yorker)

• The Rise of ‘DIMBYism’: Open Data Is the Key to Smarter Communities: There’s simply no reason that we can’t design tools to bring city-dwellers into a closer relationship with information that can inform their choices. (Huffington Post)