Which factor do unions prefer when negotiating with employers over criteria for job opportunities, such...

Unionized workers typically enjoy more secure benefits compared to nonunionized workers, with guaranteed pensions being one of the most secure. Unions negotiate defined benefit pension plans that promise a specified monthly benefit at retirement, which is often based on factors such as salary history and years of service. These plans provide financial security for employees upon retirement and are less common in nonunionized workplaces, where defined contribution plans like 401(k)s are more prevalent.References:

Noe, R. A., Hollenbeck, J. R., Gerhart, B., & Wright, P. M. (2019). Human Resource Management: Gaining a Competitive Advantage. McGraw-Hill Education.

Freeman, R. B., & Medoff, J. L. (1984). What Do Unions Do?. Basic Books.