The Wal-Mart EffectBy: Charles Fishman "Highly readable, incisive, precise, and even elegant." San Francisco Chronicle "Insightful." BusinessWeek Wal Mart isnt just the worlds biggest company, it is probably the worlds most written about. But no book until this one has managed to penetrate its wall of silence or go beyond the usual polemics to analyze its actual effects on its customers, workers, and suppliers. Drawing on unprecedented interviews with former Wal Mart