Economic conditions Petroleum industry and trade Politics and government 21 History 18 Social conditions 17 Environmental aspects 9 Economic policy 8 יותר ... Political aspects 7 Social aspects 7 Foreign relations 5 Economic development 4 Foreign economic relations 4 Gas industry 4 Democracy 3 Industrialization 3 Postwar reconstruction 3 Automobiles 2 Dependency on foreign countries 2 Econometric models 2 Finance 2 Financial crises 2 Geopolitics 2 Government policy 2 Indians of North America 2 Indians of South America 2 Industries 2 Political violence 2 Post-communism 2 Argentines 1 Automobile industry and trade 1 פחות ...