Fifteen years ago, the Harvard sociologist William Julius Wilson published When Work Disappears, focused on the new urban poor.

15年前，哈佛大学社会学家William Julius Wilson出版了《工作消失之时》一书，主要探讨了新城市贫民问题。

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Urban sociologist Pedro Noguera says, exploring that question takes some historical perspective.

NPR: Is Segregation Undermining NYC Schools?

The urban sociologist Fred Kent and I noticed how well pedestrians unconsciously adjust their paths to navigate around each other -- except for the texters, noses pointed to the ground, who routinely bumped into people.

CNN: 'On Looking': The world you're not seeing

Mr. PEDRO NOGUERA (Urban Sociologist): New York is a lot like many large cities around the country, and even some not so large cities - where increasingly, the schools are very segregated, not only by race but also by class.

NPR: Is Segregation Undermining NYC Schools?