Secular trends and geographical variations in sex ratio at birth (CROSBI ID 222718)
Prilog u časopisu | pregledni rad (znanstveni) | međunarodna recenzija
Podaci o odgovornosti
Pavić, Dario
engleski
Secular trends and geographical variations in sex ratio at birth
Numerous studies have established the presence of secular trends and geographical variations in sex ratio at birth, albeit with mixed and often contradictory results. In addition, a multitude of environmental, social, economic, demographic and other factors has been proposed to influence the sex ratio at birth, thus complicating the interpretation of both secular trends and geographical variations. In this paper, the current state of knowledge on these issues is presented and critically assessed. Analyzing longer time series of sex ratio at birth with possible cycles and random components is given priority over establishing simple linear trends in the data. In analyzing the geographical variation in the sex ratio at birth, two different levels of analysis are distinguished (global and local), and two different sets of factors affecting the sex ratio at birth are proposed accordingly. Some key guidelines and future research directions are also proposed.
Sex ratio at birth ; Secular trend ; Geographical variation ; Time series ; Latitude
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