Lawrence, a town lost by the economic realities

We spent the last weekend to Mr. Mahmud's house in Andover, a city about 20 miles north of Boston. To attend a inviting party in another city, we're crossing a small town named Lawrence. There we saw many large factory & even residential buildings deserted. I was heard that long ago it was a very thriving industrial belt with many textile industries. Workers' houses were made nearby. With the rise in wages & other costs, America lost its competitive advantages in textile production and consequently factories shifted to China, India & even Bangladesh. As a consequence, Lawrence lost its economic activities & now looks like a crime-prone ghost city. Mostly, the next generation of the Afro-American workers live nearby now. It's a living example of how economic dynamism shifts across the nations in this globalized world.