Browsing by Author "Paradysz, Jan"
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Item Elementy perturbacyjne gospodarstwa domowego dla rozwoju rodziny(Wydział Prawa i Administracji UAM, 1977) Paradysz, JanThe Author deals with the group of perturbation elements the preceding appearance of which diminishes the probability of the succesive demographic phenomena; that probability however, does not fall to zero. The group of perturbative elements consists i.a. of the economic decision making of the family. The research on the procreative decisions of the married couples (marriages contracted in 1955-1959), resident in the former voivodeship of Rzeszów up to 31 XII 1973, has brought the following results: The purchase of durable goods perturbed the first live birth to a little extent. But the second live birth succeeded purchase of various durable goods. In the light of the applied entropy analysis the probabilities of live births were much more concentrated at the model value than those of the purchase of rather common durable goods. The choice of the first live birth is mostly defined, especially in the rural areas where the real entropy amounted to 53,9% of the maximal entropy (table 4). In the case of successive live births the uncessive live births the unspecified choice increases.Item Odstępy inter genetyczne w przekrojowej analizie płodności(Wydział Prawa i Administracji UAM, 1985) Paradysz, JanReal birth intervals are traditionally examined only in the longitudinal approach and in the relation to cohorts and generations. Nevertheless it seems justified to make sometimes several queries:1) what is the time lag between the birth in a given calendar year a of a child of the p-sequence and the previous birth p— l, 2) how much time must pass between the birth p-sequence child na given calendar year a and the p+1 child born later. Such an exposition of the problem seems interesting from at least one point of view: a possibility of analysing the effect of various historical events, related closely to the defined time span, on the length of real birth intervals. Such historical events are war, economic crisis, epidemic of pest, new regulation of abortion. All those events can prolong or shorten the type 1 and 2 intervals in the succeeding calendar years. Currently, frome one year to another, only the type 1 intervals can be traced, while the calculation of the type 2 intervals takes theoretically approximately 30 years, untili the youngest of generations will complete its period of fertility. In practice that period can be substantially shortened. Those problems are not encountered in relation to the deceased populations reconstructed on the grounds of parish registers.