More than 70,000 people participate in San Francisco-based Linden Lab's Second Life, the first online virtual community built around economics. The company's founder explains how a capitalist model fuels interest in a virtual world. A: Our residents create avatars. My Second Life avatar is "Philip Linden"-spiky hair, muscular tattooed arms, and sometimes a black T-shirt emblazoned with bright red Rolling Stones-style lips. Then they buy and sell land and use programming tools to develop it-homes, businesses, whatever you like.
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