Z metodologii badań nad wpływem dochodu na dzietność rodzin
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Date
1985
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Wydział Prawa i Administracji UAM
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From the methodology of research on the income effect on children population in families
Abstract
Population of families subjected to the all-Polish budgetary studies was divided
into sub-populations according to the level of education obtained by the
household head, duration of marriage and a character of inhabited locality. On
the ground's of the regression analysis, the thesis was formulated that there is
a relation between income and a number of children in a family which is adopting
a form of multinomial third degree function. On the base of the differential
calculus of those functions their extremes were established and the following
conclusions were thus formulated. In sub-populations of divergent socio-demographic
traits, the local minimam and maximam of the number of children are
reaching various values. The ares of income changebility determining maxima of
children number, in case of the families with the degree is on a much higher
level in comparison with the remaining families. Areas of children number changebility
in families with a degree or secondary education are more or less on the
same level, yet it remains higher in relation to the corresponding changebilities
in families with primary or vocational education. In course of prolongation of
marriage lasting the maxima of children number are reaching higher values and
they are defined by higher and higher level of income changebility, the upper
limit value for the minima of children number is also increasing. Taking the
inhabiting location under consideration it was noticed that the maxima and the
upper limits of minima of the children number are the highest for the rural
families and lower and lower in families inhabiting small towns, medium and
large cities.
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Citation
Ruch Prawniczy, Ekonomiczny i Socjologiczny 47, 1985, z. 3, s. 263-276