Final answer:
True, a work stoppage can occur due to economic disputes or unfair labor practices by employers, often involving labor unions negotiating for better wages or conditions, as evidenced by the 2015 longshoremen's stoppage.
Step-by-step explanation:
A work stoppage typically involves an economic dispute between the labor force and management, or it may result from an employer's unfair labor practice. Work stoppages can be powerful tools for labor unions when negotiating for better wages, work conditions, or opposing the use of labor-saving technologies that may impact employment levels. For instance, the 2015 work stoppage by the union representing longshoremen was primarily about the use of new technology and overtime pay. Federal mediation, including threats of invoking the Taft-Hartley Act, sometimes plays a role in resolving these disputes and was notably used in this case to broker a deal that both implemented new technologies and maintained favorable compensation for the workers.