"level of unionization" is correct and usable in written English.
It can be used to indicate the extent of people joining a union in a given workplace or region, or the strength of unions. For example: "The level of unionization in this region is much higher than in the rest of the country."
Empirically, it's extremely elusive, because it depends on many other things, such as the rate of productivity growth, tax rates, the labor-force participation rate, and the level of unionization.
He and Professor Hoxby examine the effects of two different trends: changes in the ratio of male and female pay across all professions and changes in the level of unionization among teachers.
They have name recognition, she said, and foreign companies often gravitate to them even though Arizona has lower operating costs and right-to-work laws that result in a low level of unionization at workplaces.
In addition, data collected by the OECD show that the level of unionization of the labor force has remained relatively stable during the past decades.
This is by far the lowest level of unionization of any major democratic country.
Overall, with about one-sixth of its workforce belonging to unions, Spain has one of the lowest levels of unionization in Europe.
It is at very low levels of unionization and bargaining coverage that wage bargaining is allowed to go un-coordinated.
State and local workers, particularly in the six states with the highest levels of unionization, received better benefits than the average private sector worker in a similar job.
Thus, Argentina has a degree of unionization approaching 40 percent, whereas the Dominican Republic has less than 10 percent trade-union membership.
17Several other time-varying industry level variables might also impact the results: the share of blue collar relative to white collar workers, the degree of unionization and the share of casual workers, among others.
Our results largely support their findings: industry concentration and degree of unionization for instance hamper innovation; skilled labor promotes it.
