SUBJECT
Economic aspects
Agriculture
48
Mathematical models
25
Social aspects
23
Education
18
Economic conditions
11
Agriculture and state
9
Economic policy
9
Environmental aspects
9
Government policy
9
Households
8
Irrigation
7
Constitutional law
6
Economic development
6
Fisheries
6
Population
6
Rice
6
Emigration and immigration
5
Food supply
5
Management
5
Migration, Internal
5
Natural disasters
5
Economics
4
Effect of education on
4
Emigrant remittances
4
Farm risks
4
Labor supply
4
Land reform
4
Political aspects
4
Roads
4
Rural development
4
Social conditions
4
Wages
4
Agricultural prices
3
Community development
3
Crime
3
Education, Higher
3
Emergency management
3
Fertility, Human
3
Fishing
3
Folklore
3
Human capital
3
Local government
3
Marketing
3
Philippines
3
Politics and government
3
Research
3
Rural conditions
3
Rural families
3
Rural industries
3
mer ...