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Arbitron Co. said it has placed Portable People meters (PPM) with...

Arbitron Co. said it has placed Portable People meters (PPM) with first 50 consumers for its upcoming Philadelphia market trial. Arbitron plans to install meters in another 250 homes over next 6 to 8 weeks. Company said 54 radio,…

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broadcasting and cable outlets are now encoding their signals in preparation for trial, with at least another 16 expected to be added to list.