On North America’s economic map, the border has ceased to be a dividing line: it is now a platform. The rise of the Mexican diaspora in the United States—through business, professional, and community networks—is fueling the creation of de facto “special economic zones”: preferential tax and customs regimes, strategic trade facilities, and foreign-trade zones that connect capital, talent, and supply chains on both sides of the boundary. The question is no longer whether the di
