The CIW launched a boycott of Taco Bell in 2001, holding the company accountable for the wages and working conditions of farmworkers in its tomato supply chain. The CIW argued that when major buyers such as Taco Bell leverage their volume purchasing power to demand discounts from their suppliers, they create strong downward pressure on wages and working conditions in these suppliers' operations. A 2004 study by Oxfam America confirmed this trend: "Squeezed by the buyers of their produce, growers pass on the costs and risks imposed on them to those on the lowest rung of the supply chain: the farmworkers they employ."