Effect of fertility on secondary sex ratio and twinning rate in Sweden, 1749-1870

Johan Fellman, Aldur Eriksson

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

1 Citeringar (Scopus)


We analyzed the effect of total fertility rate (TFR) and crude birth rate (CBR) on the number ofmales per 100 females at birth, also called the secondary sex ratio (SR), and on the twinning rate (TWR). Earlier studies have noted regional variations in TWR and racial differences in the SR. Statistical analyses have shown
that comparisons between SRs demand large data sets because random fluctuations in moderate data are marked. Consequently, reliable results presuppose national birth data. Here, we analyzed historical demographic data and their regional variations between counties in Sweden. We built spatial models for the TFR in 1860 and the CBR in 1751–1870, and as regressors we used geographical coordinates for the provincial capitals of the counties. For both variables, we obtained significant spatial variations, albeit of different patterns and power. The SR among the live-born in 1749–1869 and the TWR in 1751–1860 showed slight spatial variations. The influence of CBR and TFR on the SR and TWR was examined and statistical significant effects were found.
Referentgranskad vetenskaplig tidskriftTwin Research and Human Genetics
Sidor (från-till)92-99
Antal sidor8
StatusPublicerad - 12.2014
MoE-publikationstypA1 Originalartikel i en vetenskaplig tidskrift


  • 112 Statistik
  • 512 Företagsekonomi


Fördjupa i forskningsämnen för ”Effect of fertility on secondary sex ratio and twinning rate in Sweden, 1749-1870”. Tillsammans bildar de ett unikt fingeravtryck.

Citera det här