(May 18, 2014) -- Louisiana-Pacific Corp. has abandoned its plan to acquire Ainsworth Lumber Co. Ltd., its top competitor in the sale of a specialized manufactured wood-based panel, after the Justice Department expressed concerns that the deal likely had anticompetitive effects. Specifically, the Department advised the parties that the deal would likely have substantially lessened competition in the market for “oriented strand board” sold in the Pacific Northwest and Upper Midwest regions of the country....