1 Subjects: “...population...”

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

3 Subjects: “...population...”

4 Subjects: “...population density...”

5 Subjects: “...population...”

6 Subjects: “...population urbanization...”

7 Subjects: “...rural population...”

8 Subjects: “...population density...”

9 Subjects: “...population density...”

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

11 Subjects: “...older population...”

12 Subjects: “...natural population...”

13 Subjects: “...multi-population method (MP)...”

14 Subjects: “...multi-population method (MP)...”