Volume 13 - Article 23 | Pages 573–596  

Modelling regional variation of first-time births in Denmark 1980-1994 by an age-period-cohort model

By Lau Caspar Thygesen, Lisbeth B. Knudsen, Niels Keiding


Despite the small size of Denmark, there have traditionally been rather consistent regional differences in fertility rates. We apply the statistical age-period-cohort model to include the effect of these three time-related factors thereby concisely illuminating the regional differences of first-time births in Denmark. From the Fertility of Women and Couples Dataset we obtain data on number of births by nulliparous women by year (1980-1994), age (15-45) and county of residence. We show that the APC-model describes the fertility rates of nulliparous women satisfactorily. To catch the regional variation an interaction parameter between age and county is necessary, which provides a surprisingly good description suggesting that the county-specific age-distributions of first-time fertility rates differ. Our results are in general agreement with the 'moral geography' concepts of Tonboe (2001).

Author's Affiliation

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Cause-specific measures of life years lost
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Cohort fertility patterns in the Nordic countries
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Biological and sociological interpretations of age-adjustment in studies of higher order birth rates
Volume 19 - Article 31

The Fertility Pattern of Twins and the General Population Compared: Evidence from Danish Cohorts 1945-64
Volume 6 - Article 14

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