Final answer:
The concept that does NOT exist in Western European labor relations is exclusive representation of a bargaining unit, where one union represents all employees.
Step-by-step explanation:
The concept that does NOT exist in Western European labor relations systems is exclusive representation of a bargaining unit. This concept is more prevalent in the United States labor relations system, where a single union represents all employees in a bargaining unit and is responsible for collective bargaining.
In contrast, Western European systems often involve multiple unions and representatives engaging in negotiations, and work councils play a significant role in these discussions. Additionally, benefits in Western European countries can be influenced by the political arena, and there is typically a strong commitment to training and development.
These factors, among others, contribute to the differences in union membership and coverage observed between the United States and Western European countries. While in the U.S., union membership and coverage are closely mirrored, in many European countries.