1 Subjects: “...net income per employee...”

2 Subjects: “...low-income...”

3 Subjects: “...income inequality...”

4 Subjects: “...rural household income...”

5 Subjects: “...income level...”

6 Subjects: “...income...”

7 Subjects: “...faculty income...”

8 Subjects: “...household income...”

9 Subjects: “...income...”

10 Subjects: “...low and middle income countries...”

11 Subjects: “...low and middle income countries...”