This study investigates changes in the Mutual Aid Association for Agricultural, Forestry and Fishery Organization Personnel. (Nourin Nenkin) during the 1970s by analyzing the relationship between Nourin Nenkin and labor productivity, wages, and business structure in the agricultural cooperatives, the Employees’ Pension Insurance system, and the National Public Service Personnel Mutual Aid Association. The main results are as follows : First, the Association’s credit business exerted a positive effect on labor productivity by creating additional value per employee as it grew larger. However, neither the merger of the agricultural cooperatives nor the scale of the insurance business had any effect on labor productivity. Second, the contribution rate, already high, of the agricultural cooperatives increased by a nominal amount, and the reserve―financing scheme was maintained. Third, given the wages of agricultural cooperatives’ employees, Nourin Nenkin realized high pension benefits. Finally, the study finds that the separation of the public pension schemes generated institutional competition between the schemes and improved pension benefits, as the revised rates and frameworks of the Employees’ Pension Insurance system and the National Public Service Personnel Mutual Aid Association were adopted for Nourin Nenkin.
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