Economic conditions 125 History 93 Economic aspects 55 Economic policy 52 Agriculture 46 Social conditions 41 Working class 29 more ... Industries 26 Rural conditions 25 Land tenure 20 Population 19 Business enterprises 18 Sustainable development 17 Commerce 16 Foreign economic relations 15 Politics and government 15 Collective farms 13 Technological innovations 13 Cities and towns 12 Agricultural industries 11 Cost and standard of living 11 Finance 11 Management 11 Regional planning 11 Agriculture and state 10 Industrial management 10 Peasants 10 Social aspects 10 Social policy 10 World War, 1939-1945 10 less ...