Final answer:
Employers and union workers in the western state are worse off. Workers in the eastern state are not affected or may benefit.
Step-by-step explanation:
The question asks about the impact of a union action in a western state on different groups. When the union negotiates a higher wage in the western state, some workers may lose their jobs and decide to move to the eastern state. This will increase the labor supply in the eastern state, causing wages to decrease and employment to increase. As a result, employers in the western state and workers in the western state employed at the union wage are worse off, while all workers in the western state and the original workers in the eastern state are not affected or may even benefit from the increased labor supply.