Modele regresji liniowej dzietności rodzin względem dochodu
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Date
1988
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Wydział Prawa i Administracji UAM
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Models of linear regression of a nomber of children in a family and income
Abstract
In economic theories concerning a number of children in a family income
plays a special role. On the one hand, it is the factor shaping all possible attitudes
and behaviors (including procreation) and — on the other — it is a factor setting
in motion and controlling the functioning of competition mechanisms in the sphere
of behavioral processes.
The article presents the results of the analysis aimed at determining general
character and intensity of the influence of income on the number of children in
a family. The empirical basis of the analysis was the all-Polish research into
family budgets in years 1973 - 1983. The calculus of correlation and linear regression
was used with respect to more homogenous subpopulations distinguished
according to the features differentiating procreative behaviors such as: the length
of marriage, the level of education of the head of the household, and the character
and class of place of residence. It has been found that although in some cases
the range of variations of a number of children in a family explainable in terms
of income was considerable, on the average income explained only a small
fraction of all such variations. In most part of the subpopulation the dependence
of the number of children on income was statistically insignificant. In turn, in
the cases where that dependence could be considered significant, it was of positive
character and usually the lower the level of education of the head of the household
was, the stronger that dependence became. In the light of the above results one
may suggest that the material status of a family better than the status of families
belonging to the same social group is correlated with a weaker function of aspects
of material competition with respect to having children. Thus a better material
status strengthens extra-economic motivations for having a preferred number of
children.
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Citation
Ruch Prawniczy, Ekonomiczny i Socjologiczny 50, 1988, z. 2, s. 225-236