本論文では, 各国の年金制度における自営業の取り扱いについて展望し, 独自の個票データを使って自営業者の保険料の納付行動の分析を行った。
この結果, 自営業に対する保険料の強制徴収を強め, 負担能力に応じた保険料の仕組みの導入が必要であることが確認できた。このことから, ただちにすべての自営業者を被用者と全く同じ所得比例年金と最低保障年金の仕組みに組み入れるべきとは結論づけられないが, 諸外国でも工夫している年金制度における自営業者への対応を参考に多くの改善点が必要である。
This study considers the handling of self-employed workers in national pension systems of each country, using our own individual data to analyze the behavior of contribution payments of insurance premiums by self-employed workers.
As a result, we confirm that it is necessary to strengthen the compulsory collection of insurance premiums from self-employed workers and introduce an insurance premium framework in accordance with their payment capacity. 
From this, although we cannot conclude that all self-employed workers shall be immediately included in the same income-proportionate pension and minimum-security pension schemes of other employees, examining the measures toward self-employed workers in pension systems devised in other countries, numerous improvements are necessary.

小特集 : 年金制度の実証研究 : 根拠に基づく政策論