1 Subjects: “...efficient portfolios...”

2 Subjects: “...Integration Efficiency...”

3 Subjects: “...time-varying or adaptive market efficiency...”

4 Subjects: “...smoke extraction efficiency...”

5 Subjects: “...treatment efficiency...”

6 Subjects: “...energy efficiency...”

7 Subjects: “...livelihood efficiency...”

8 Subjects: “...technical efficiency...”

9 Subjects: “...tsunami efficiency...”