本研究は若年者の国民年金保険料の納付行動について分析を行った。若年者納付猶予は本人収入が低い場合, また, 免除制度は世帯収入が低い場合に利用確率が高くなることがわかった。これは, 制度設計上の扱いと整合的な結果である。
そして, 学生納付特例利用経験者の分析から, 第1号被保険者は有意に追納確率が低くなり, また, 若年者納付猶予利用経験者の分析から, 本人収入が低くなると追納確率が低くなることを明らかにした。
This study analyzes the national pension contribution payment behavior of youths. 
We determined that youths' rate of use of contribution postponement becomes higher in cases wherein the income is low or when the exemption system is applied to low household incomes. 
This is consistent with its institutional design.
Clearly, from the analysis of those with use experience of the students' payment exception, the rate of voluntary repayment of past contributions for Primary Insured Persons becomes low; in addition, from the analysis of those with use experience in youths' contribution postponement, it is clear that when an insured person's income becomes low, repayment of past exempted contributions also becomes low.

小特集 : 年金制度の実証研究 : 根拠に基づく政策論