TED】エフォサ・オジョモ。汚職を減らすには特定の種類の投資が必要 (汚職を減らすには特定の種類の投資が必要｜エフォサ・オジョモ) (【TED】Efosa Ojomo: Reducing corruption takes a specific kind of investment (Reducing corruption takes a specific kind of investment