C効率性
↑ https://www.mizuho-ri.co.jp/publication/research/pdf/insight/pl160316.pdf
↑ https://www.rieti.go.jp/jp/events/bbl/10072901_morinobu.pdf
↑ https://www.cas.go.jp/jp/seisaku/syakaihosyou/syutyukento/dai9/siryou3-7.pdf
1 2 https://dl.ndl.go.jp/view/download/digidepo_1000895_po_200804.pdf?contentNo=1
1 2 3 https://www.westlawjapan.com/column/2010/100607/