"union strength" is correct and usable in written English.
You can use it to refer to the collective power of individuals who are united together in a particular cause or organization. For example, "This company needs to tap into its union strength in order to push for improvements in working conditions."
We generally find that the preponderance of empirical evidence suggests that teacher unionization and union strength are associated with increases in district expenditures and teacher salaries, particularly salaries for experienced teachers.
As in the U.S., public-sector unionism is strong in Europe, Canada and Japan, and the illusion of continued union strength abroad reflects mainly the fact that their public sectors are relatively larger than ours.
Men with high school diplomas (and no further education) are more typically unionized than are women and are therefore more affected by a decline in union strength than by a falling minimum wage.
In 1911, during an early show of trade union strength, there was a transport strike.
Union strength depends on worker unity, but workers are divided by race.
But inside the Statehouse, people are consumed by something else entirely: a partisan fight over union strength has boiled over.
His efforts have always foundered on trade-union strength and a corporate culture that stresses professionalism and meritocracy.
But the Order's 15,000-strong show of visceral pro-union strength through Scotland's capital was broadly good-natured, though fiercely so.
The name is a reference to the hugely popular Renault 4L, an acknowledgment of the carmaker's importance for the Île Seguin, where its factory was a symbol of French industrial productivity and labor-union strength until it closed in 1992.
But agency fees also help bolster the unions' strength.
Hinson's fear is "right-to-work" legislation, which drains unions' strength by taking away their ability to charge non-union workers for their collective bargaining with employers.
