How human networks drive inequality, social immobility

To understand why people succeed or fail, look at their circle of friends. Like it or not, said Stanford economist Matthew Jackson, people's fates are closely connected to their human networks.

Dell buyout in turmoil as Icahn enters the fray (Update)

A proposed buyout of computer maker Dell Inc. appeared less likely Thursday after activist investor Carl Icahn said Dell should remain a public company and reward shareholders with a big, one-time payout.

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