[An empirical analysis of the effects of nudge-based measures on job seekers' participatory behavior in the Care...

Objectives　The study aim was to explore effective measures to promote job seekers' participation in the Care Worker Initial Training course provided by Hello Work.Methods　In this study, we adopted the nudge approach as a method to promote behavioral changes based on a knowledge of behavioral economics. Additionally, we tested the effectiveness of nudge-based measures compared to that of conventional measures. The survey was conducted through two rounds of Web distribution. In the first Web distribution, we consistently implemented the following, in order: 1) recruited individuals who agreed to participate in the study, 2) distributed the first Web questionnaire regarding basic attributes and eligibility criteria in terms of the target individuals, and 3) distributed course guidance. Individuals who responded to the first Web questionnaire (n=50,000) were randomly assigned to eight groups. The intervention groups were presented with course guidance based on loss-aversion nudge, empathy nudge, long-term gain nudge, and their combinations. The control group was presented with traditional course guidance used by the Ministry of Health, Labour and Welfare over the Web. Two weeks after the intervention, we identified 2,404 individuals who met the eligibility criteria and assessed their behavioral changes (pre-contemplation, contemplation/preparation, information-gathering, action); we received responses from 1,995 individuals. Binomial logistic regression analyses were performed using nudge-based interventions and behavioral change stages as dependent and independent variables, respectively. Sex, age, education level, marital status, interest in caregiving before the intervention, and behavioral change stages before the intervention were included as moderator variables.Results　A total of 1,995 individuals were included in the analysis. Among the 1,756 participants in the intervention groups, 321 (18.3%) took on contemplation/preparation behavior, 102 (5.8%) took on information-gathering behavior, and 50 (2.8%) took action by participating in the course. Among the 239 individuals in the control group, 38 (15.9%) took on contemplation/preparation behavior, 31 (13.0%) took on information-gathering behavior, and 2 (0.8%) took action by participating in the course. Binomial logistic regression analyses showed that while traditional measures were effective in promoting information-gathering behavior toward participation, nudge-based measures combining loss-aversion nudge, long-term gain nudge, and empathy nudge were effective in motivating individuals to participate in the course (odds ratio: 5.39, 95%CI: 1.18-24.74, P=0.03).Conclusion　The introduction of measures combining multiple types of nudges is necessary to promote participation in the Care Worker Initial Training course, rather than traditional measures or a nudge in isolation.