World War, 1914-1918 41 Economic aspects 40 Economic conditions 3 Finance 3 Industrial policy 3 Coal trade 2 Commerce 2 more ... Labor 2 Labor movement 2 Munition workers 2 Prices 2 Shipping 2 Tariff 2 Working class 2 African Americans 1 Army 1 Bibliography 1 Casualties 1 Casualties (Statistics, etc.) 1 Children 1 Coal miners 1 Coal mines and mining 1 Defense contracts 1 Defense industries 1 Economic history 1 Economical aspects 1 Electric power-plants 1 Employee participation 1 Employees 1 Employment 1 Food supply 1 Foreign relations 1 Free trade 1 Free trade and protection 1 Government ownership 1 Government publications 1 History 1 Labor and laboring classes 1 Labor laws and legislation 1 Labor supply 1 less ...