Labor rates should be the same. See this link for an earlier discussion 2 years ago:
http://www.detroityes.com/mb/showthr...o-Mexico/page2
In a Free Press article Dick Dausch claimed that employee absenteeism was the problem. A quote, "...on some days it can approach nearly one-third of the workforce in parts of the plant. Lines have been shut down because not enough employees show up."
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