" Diversity in employment relations is growing in the United States as a product of the growth in non-union employment and the existence of a variety of union and non-union employment practices. There is also wide variation in recent U.S. collective bargaining. In some firms heightened conflict appears, while in some others extensive partnerships have been forged. While some workers and firms are suffering as management takes advantage of the power advantages provided through non-union growth and globalization, in some other firms unions are using innovative bargaining or traditional strike leverage to make gains. "

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