NOAM SCHEIBER

Amid a dissident bid for board seats and boycotts by activists, the company has sent mixed signals about its willingness to engage with labor groups.

The National Labor Relations Board said the rocket company had wrongly dismissed eight people for a letter raising concerns about the chief executive.

The company has disciplined union supporters and fired one in recent weeks, ahead of a trial that will weigh their right to interact with co-workers.

Once accustomed to a status outside the usual management-labor hierarchy, many health professionals now feel as put upon as any clock-punching worker.

Experts said the union’s new contracts could set precedents that give labor advantages when bargaining contracts and organizing workers.

Shawn Fain owes his rise within the United Automobile Workers to a group determined to make the union far more confrontational toward automakers.

The physicians, at Allina Health in Minnesota and Wisconsin, appear to be the largest group of unionized doctors in the private sector.

UPS, the Hollywood studios and the Detroit automakers appear to have been taken aback by the tactics and tougher style adopted by new union leaders.

When Francesca Gino, a rising academic star, was accused of falsifying data — about how to stop dishonesty — it didn’t just torch her career....

Experts on unions and the industry said the U.A.W. strike could accelerate a wave of worker actions, or stifle labor’s recent momentum.