While "doing some work in Mexico"was almost always arm's length business in the past, sourcing in Mexico today meansserious commitments and close communications for firms on both sides of the border. The apparel industry - perhaps the mostglobalized and internationalized of all manufacturing sectors - is experiencing theemergence of a significant trend toward the regionalization of trade and production.Driven by a variety of factors from trade liberalization to demand for quick-turn service,this movement has led to the growth of regional apparel nerve centers, as well as complextransnational sourcing alliances.