While most multiemployer bargaining is done within a relatively small geographic area, it also occurs on an industry wide basis when products or services are essentially commodities. In trucking, major unionized inter- state truckers are represented by an employers' association that bargains with the Teamsters Union, resulting in the National Master Freight Agreement. However, maintaining an industry wide bargaining structure is a perilous proposition. As more employers are included, their sizes and abilities to take strikes become dissimilar. In trucking, employers face