労働組合機能における契約社員と正社員の比較分析

抄録

This study compared the functions of labor unions between a sample of contract workers and full-time salaried workers, based on survey questionnaires. First, it examined the manner in which full-time salaried workers and contract workers were engaged with labor unions. According to the study's findings, labor union membership rate of contract workers was lower than that of full-time salaried workers. In addition, although the full-time salaried workers and contract workers equally voiced their opinions and made requests to their superiors, when the contract workers joined labor unions, they communicated through their union representatives. Second, the effects of labor unions on full-time salaried workers and contract workers were analyzed. Among the full-time salaried workers, the effects of both labor unions and union members on employment security were statistically positive, whereas other effects were statistically non-significant. Meanwhile, the effects of other systems on wages, jobs, and human relations in companies without labor unions were also positive. Third, among the contract workers, the effects of union members on employment security were statistically positive, whereas the effects of labor unions on wages and jobs were statistically positive. In sum, the effects of labor unions on contract workers were greater than those on full-time salaried workers. Despite this finding, there are two possible reasons for the limited number of contract workers to join labor unions. The first reason is that contract workers have a greater incentive to leave a company compared to their full-time salaried counterparts; the second reason is that contract workers are used to consulting their superiors, instead of union representatives.