1 Subjects: “...population reduction...”

2 Subjects: “...-19,Repo specialness,Public debt sustainability,Cryptocurrency,Populism,Tail risk,Market risks...”

3 Subjects: “...population...”

4 Subjects: “...population...”

5 Subjects: “...population density...”

6 Subjects: “...population...”

7 Subjects: “...young populations...”

8 Subjects: “...population exposure to air pollutant...”

9 Subjects: “...population growth...”

10 Subjects: “...population density...”

11 Subjects: “...older population...”

12 Subjects: “...finite population...”

13 Subjects: “...population-based intelligent optimization algorithm...”

14 Subjects: “...Spatial and population change...”