Another possible case is that the merger of competing buyers may reduce competition in a way that is harmful to the seller. So the agency has claimed the effect on sellers arising from a lessening of competition. Which is, mergers of buyers can not increase the market power of the buyer, but it may still cause the merged company to lower prices—a classical exercise of monopsony power. For example, a merger of Tyson Foods and Hillshire Farms could enable the merged company to reduce the prices paid to pig farmers for animals used to make sausage.