Self-driving cars now need a permit in California

Computer-driven cars have been testing their skills on California roads for more than four years—but until now, the Department of Motor Vehicles wasn't sure just how many were rolling around.

Barriers to opportunity

How much does your neighborhood determine your life chances? Sociologist and urban planner Xavier de Souza Briggs recently completed a 20-year social experiment on ghetto poverty that asked: If people in high-poverty, high-risk ...

Research on urban ghettos must recognize differences among cities

Research on urban neighborhoods must take into account differences among cities and rely on some techniques that have not been used extensively by sociologists studying neighborhood effects, according to Mario Small, professor ...

World's dangerous neighborhoods produce aggressive children

Children around the world who grow up in dangerous neighborhoods exhibit more aggressive behavior, says a new Duke University-led study that is the first to examine the topic across a wide range of countries.

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