These Mexican factories are located close to the U. S./Mexico border. Traditionally, they have provided economic opportunity for Mexican workers. The average wage is $2.20 per hour or four times Mexico’s minimum wage. One million Mexicans work at these plants producing auto parts, consumer electronics, and other products targeted for U. S. consumers.
See "Mexican Border Factory Output Is Slowing", CHRIS KRAUL, Los Angeles Times, October 7, 2001