Journalist ROBERT KRULWICH. He's correspondent for the PBS series Frontline. His documentary "High Stakes in Cyberspace" airs Tuesday, Oct. 31 (at 9 PM). KRULWICH explores the growing industry of advertising in cyberspace, and its social and cultural impacts. He interviews software designers who are creating the new programs used by advertisers, and also the advertisers themselves, who are counting on the information superhighway as an arena where they can keep track of the buyers' behavior, and where they can also successfully market their products
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