Not long ago, MIT political scientist Suzanne Berger was visiting a factory in western Massachusetts, a place that produces the plastic jugs you find in grocery stores. As she saw on the factory floor, the company has developed an innovative automation system that has increased its business: Between 2004 and 2008, its revenues doubled, and its workforce did, too. Moreover, the firm has found a logical niche: Since plastic jugs are both bulky and inexpensive, it’s not economical to produce them overseas and ship them to the United States, simply to fill them with, say, milk or syrup.

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