Geographic Variation in Fertility Measures in Sweden in (1749-1870)
Johan Fellman & Aldur W. Eriksson · Journal of Advances in Medicine and Medical Research · 2015
We analysed geographic variation in the number of males per 100 females at birth also called the secondary sex ratio (SR), the crude birth rate (CBR), the total fertility rate (TFR) and the twinning rate (TWR). Earlier studies have noted geographic variations in the TWR and racia...
Open access
Research Article
10.9734/BJMMR/2015/15182