Subfield
- Strategy and Management50
- Demography49
- Waste Management and Disposal48
- Applied Mathematics46
- General Economics, Econometrics and Finance45
- Sociology and Political Science40
- Management, Monitoring, Policy and Law39
- Pollution38
- Health36
- Finance35
- Communication34
- Water Science and Technology34
- Plant Science33
- Library and Information Sciences32
- Social Psychology32
- Urban Studies32
- Virology32
- Forestry31
- Geography, Planning and Development30
- Energy Engineering and Power Technology28