Most studies have found that union workers are more productive than nonunion workers.

Union Workers

Employees who are members of a labor union, which represents them in negotiations with employers over wages, benefits, and working conditions.

Productive

Relates to the capability of producing a significant amount or result, especially in terms of work or economy.

Nonunion Workers

Employees who are not members of a labor union and do not receive the collective bargaining advantages that unionized workers might have.