Temporal, seasonal, and regional differences in births and deaths in Aland (Finland)

Human Biology
Aldur W ErikssonKari Pitkänen

Abstract

A good knowledge of the seasonal variation during normal years is of fundamental importance for analyses of the effects of wars, famines, epidemics, or similar privations on births and deaths. In this study we consider data from the Aland Islands (Finland) for 1650-1950. During the period 1650-1793 there are subperiods with missing data for all parishes, and consequently the total data for the Aland Islands for this period have to be estimated using available data. For the period 1794-1950 the registered data seem to be complete and reliable, but the war year 1809 shows a marked deficit of births. During the last decades of the 19th century the number of births increases markedly and after that shows a strong decrease. After the 1930s births increase again. To allow seasonality comparisons between the Aland Islands as a whole and its subregions, we base our studies on seasonal indexes. There is a markedly decreasing temporal trend in the seasonal variation of births for the Aland Islands as a whole, but the general pattern remains mainly the same, having two peaks, one in March-April and one in September-October. For the period 1901-1950 the seasonal variation almost disappeared. The strength of the seasonal variation in births...Continue Reading

References

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Citations

Oct 20, 2009·Biodemography and Social Biology·Johan Fellman, Aldur W Eriksson
Jun 11, 2020·Demography·Miikka VoutilainenHarri Högmander
Apr 25, 2017·Twin Research and Human Genetics : the Official Journal of the International Society for Twin Studies·Johan Fellman

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