Central government policies 172 Educational strategies & policy 148 Politics & government 123 Education 122 Environmental policy & protocols 107 Sociology 80 Public administration 72 Development economics & emerging economies 67 Political economy 56 Research & information: general 52 International relations 49 Applied ecology 48 Economics 48 Political science & theory 46 Society & social sciences 46 Environmental economics 37 Environmental management 36 Migration, immigration & emigration 36 Sustainability 36 Development studies 35 Energy technology & engineering 33 Higher & further education, tertiary education 32 Humanities 31 Political structure & processes 28 Technology: general issues 28 Social welfare & social services 26 Business & management 24 Organization & management of education 24 Philosophy & theory of education 24 Human geography 22