Population Demography 41 History 21 Social conditions 18 Economic conditions 11 Sociology 11 Démographie 10 Economic aspects 10 Economic history 8 Demografia 7 Birth control 6 Population research 6 Environment 5 Health aspects 5 Population policy 5 population 5 Business & Economics 4 Fertility, Human 4 International economic relations 4 Labor market 4 Població 4 Public health 4 Social aspects 4 Bevölkerung 3 City 3 DEMOGRAPHIC RESEARCH 3 Economic development 3 Emigration and immigration 3 Environmental aspects 3 Ethnology 3