とうしげんかいこうりつ 投資の限界効率 LinksSentence search for 投資の限界効率Sentence search for とうしのげんかいこうりつKanji details for 投, 資, 限, 界, 効 and 率Edit in JMdict Expressions (phrases, clauses, etc.), Noun1. marginal efficiency of investment Discussions Log in to talk about this word.