By standardizing wages in all regions, unions distort the supply of labor. Although the wage premium in the United States and the United Kingdom has declined in recent years , , it remains high and statistically significant for most groups of workers. The NRA should be amended to allow workers to designate a bargaining unit with multiple employers or to associate multiple bargaining units with one or more unions in negotiations with multiple employers. These negotiations could be conducted either horizontally (within a sector) or vertically (to cover the supply chain). Currently, the negotiation of several employers at the employer`s choice is as follows: workers, unions and the NRBA do not have the opportunity to insist on this format, even if it is the most useful. The voluntary nature of multi-employer negotiations allows employers, employees and unions to play against one another in one place. The law should be amended to allow workers and trade unions to request negotiations with several employers, with the NLRB instructed to approve the request unless there are compelling reasons why the approach should not be followed. The term “collective bargaining” was first used in 1891 by Beatrice Webb, founder of the field of industrial relations in Britain.  It refers to the type of bargaining and collective agreements that had existed since the rise of unions in the 18th century. Whether unions actually compress pay gaps depends on the position of unionized workers in the distribution of wages, the union bonus linked to different types of workers, and the degree of centralization and coordination in collective bargaining. Unions continue to cut wages in the United States, Canada and the United Kingdom, although there are some differences as to the evidence of the effect on women . The Law on the Protection of the Right to Organize (PRO) removes obstacles to the organization of workers, limits employers` interference in the organization of workers and sets reasonable penalties if employers violate the law41.
42 Law PRO contains a strong common employers` standard43 which would enable workers and trade unions to obtain the corresponding employers at the negotiating table. . . .