Juarez coincidently across from the maquiladora industries headquarters. Because maquiladora factories in Matamoros don't pay local taxes, local medical services are underfunded. The industrial sector is small but one maquiladora plant alone employs around 800 workers. Nogales, Arizona, and Nogales, Sonora, are home to one of the largest maquiladora clusters. Income in the maquiladora sector has increased 15.5% since the implementation of NAFTA in 1994. Tamaulipas's economy has a strong focus on export oriented manufacturing (i.e. maquiladora / INMEX). Since then he developed prototypes of shipping container housing for typical maquiladora workers in Mexico. Coahuila's economy has a strong focus on export oriented manufacturing (i.e. maquiladora / INMEX). Maquiladora women workers are not the only ones affected by the violence. The city operates about 35% of the Tamaulipas' maquiladora industry, placing second, just behind Reynosa. Maquiladora employment is one area of debate among scholars of women's export sector employment. Baja California's economy has a strong focus on tariff-free export oriented manufacturing (maquiladora). For example, Rosemary Hennessy analyzes grassroots organization in four maquiladora communities along Mexico's northern border. In the book, a Mexican Maquiladora worker is found dead with her disembodied baby. Of all interior (non-border) locations in Mexico, Chihuahua has the largest maquiladora presence in Mexico.