Politics and government 45 Foreign relations 26 Economic integration 18 Vocational education 16 Law and legislation 11 Political planning 9 Foreign economic relations 8 National security 8 Occupational training 8 Security, International 7 Economic policy 6 Law 6 Military policy 6 Commercial policy 5 Environmental law 5 Social policy 5 Economic conditions 4 Environmental policy 4 European Union 4 Evaluation 4 History 4 Regional planning 4 Research 4 Constitutional law 3 Continuing education 3 Environmental impact analysis 3 Foreign trade regulation 3 Government policy 3 International and municipal law 3 Nationalism 3