Robin Boyle, an urban planner at Wayne State University, has studied the situation for years.

NPR: Detroit Poverty Getting Worse

For the architect and urban planner, working in Asia offers the greatest range of opportunities and possibilities.

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Tajbakhsh was an independent consultant and urban planner employed by U.S. philanthropist George Soros' Open Society Institute.

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Born in Argentina to Cuban parents, Perez started out as an urban planner and then moved into low-income housing development.

FORBES: Jorge Perez

Just as urban planner Robert Moses shaped the way many modern cities are structured, Jobs set the standard for how digital music is bought, consumed, and (sometimes) created.

FORBES: Remembering Steve Jobs, Pop Artist

Architectural adviser and urban planner David MacKay said he also had concerns, but there was nothing he could do as plans were approved before his Vision For Plymouth scheme.

BBC: NEWS | UK | England | Devon | 'Concrete box' centre defended

"All over the country there are signs that say 'Central Business District, '" reported Alexander Garvin, an urban planner who is a former commissioner on the New York City Planning Commission.

WSJ: Lost Cause in New York

The potential for mobile devices to transform the urban environment is of particular interest to Anthony Townsend, an urban planner at the Taub Urban Research Centre at New York University.

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