Journal Article Historical Article 5,085 Biography 1,582 Population 743 Demographic Factors 712 Population Dynamics 635 English Abstract 532 Developed Countries 437 Developing Countries 406 Research Methodology 403 Economic Factors 399 Population Characteristics 318 Socioeconomic Factors 291 Research Support, Non-U.S. Gov't 277 Europe 255 Fertility 214 Migration 208 Americas 186 Asia 184 Mortality 184 Portrait 180 Mediterranean Countries 166 Geographic Factors 159 North America 158 Age Factors 153 Socioeconomic Status 145 Family And Household 142 Models, Theoretical 142 Genetics and Reproduction 139 Africa 135