Krugman today. Good. Go read.
Oh, ok, here's the point:
Think about what happens when Wal-Mart opens a store in a previously untouched city or county. The new store takes sales away from stores that are already in the area; these stores lay off workers or even go out of business. Because Wal-Mart's big-box stores employ fewer workers per dollar of sales than the smaller stores they replace, overall retail employment surely goes down, not up, when Wal-Mart comes to town. And if the jobs lost come from employers who pay more generously than Wal-Mart does, overall wages will fall when Wal-Mart moves in.
This isn't just speculation on my part. A recent study by David Neumark of the University of California at Irvine and two associates at the Public Policy Institute of California, "The Effects of Wal-Mart on Local Labor Markets," uses sophisticated statistical analysis to estimate the effects on jobs and wages as Wal-Mart spread out from its original center in Arkansas.
The authors find that retail employment did, indeed, fall when Wal-Mart arrived in a new county. It's not clear in their data whether overall employment in a county rose or fell when a Wal-Mart store opened. But it's clear that average wages fell: "residents of local labor markets," the study reports, "earn less following the opening of Wal-Mart stores."
Walmart: Instrument of economic destruction.
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