The per-capita-income criterion and natality policies in poor countries.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D001723:Birth Rate; D002648:Child; D002675:Child, Preschool; D003906:Developing Countries; D004467:Economics; D004651:Employment; D005163:Factor Analysis, Statistical; D005260:Female; D006801:Humans; D007182:Income; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D008875:Middle Aged; D011153:Population; D011158:Population Growth; D011203:Poverty