Walmart's advantage was never really the shelf price; it was knowing what left the shelf and telling the factory before anyone else. The episode opens the machine: distribution centers built before stores, cross-docking, a private satellite network in 1987, and Retail Link, which moved restocking burdens upstream. It also weighs measured costs, from Iowa small-town studies and price effects to supplier squeezes and the labor fights that reached the Supreme Court.
Retail Link's launch year varies between 1991 and 1992 by source. Walmart's price effect is robust, but studies disagree on jobs and wages, and Stone's follow-up complicates the claim that Walmart killed small towns.