IQ/fertility relationships in Japan and Sweden |
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| Institution: | 1. Laboratory of Functional Chemistry and Nutrition of Food, College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China;2. Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, Yangling, Shaanxi 712100, China;3. Department of Neurology, Peking University Shenzhen Hospital, Shenzhen, Guangdong 518036, China;4. Northwest A&F University Shenzhen Research Institute, Shenzhen, Guangdong 518000, China;5. Dongguan Chuangwei Precision Nutrition and Health Innovation Center, Dongguan, Guangdong 523170, China;6. Shaanxi Precision Nutrition and Health Research Institute, Xi''an, Shaanxi 710300, China;1. Department of Economics, George Mason University, Fairfax, VA 22030, United States;2. Ifo Institute, University of Munich, Germany;1. Scientist in Residence, Technische Universität Chemnitz, Chemnitz, Germany;2. Center Leo Apostel for Interdisciplinary Studies, Vrije Universiteit Brussel, Brussels, Belgium;3. Department of Management, London School of Economics and Political Science, London, UK;1. Ulster Institute for Social Research, London;2. King Saud University, Department of special education, College of Education, Saudi Arabia |
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| Abstract: | This study explores the relationship between intelligence and family size in Japan and Sweden. In Japan, there is no relationship, once father's education is controlled for. However, if father's education is not controlled for, then there is a negative relationship between IQ and number of siblings. In Sweden, there is a positive relationship between IQ and fertility only for the male cohort born between 1915 and 1924. The remaining relationships, for both females and males, are neither negative nor positive. |
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