Final answer:
Unions have adopted international codes of conduct as a successful method to regulate the behavior of multinational corporations, setting global standards for worker treatment and creating accountability.
Step-by-step explanation:
In their dealings with multinational corporations (MNCs), unions have explored various methods to exert influence and secure better conditions for workers. One method that has shown a degree of success is the adoption of international codes of conduct to regulate MNCs' behavior. This approach involves setting global standards for working conditions, environmental responsibility, and fair treatment of workers, which MNCs pledge to adhere to. While this method doesn't guarantee compliance, especially with complex subcontracting chains,
it creates a framework for accountability and gives unions and activists the means to publicly hold MNCs to their commitments. Transnational bargaining, coordinating the threat of widespread strikes, and international boycotts are also tools that have been used, but the adoption of international codes has become an increasingly prominent strategy in the global landscape. It's crucial for unions to adapt to the challenges posed by globalization, cultural differences, and the changing economic environment to protect workers' rights effectively.