On an application of the diffusion approximation of the generalized birth and death process for stochastic population projection

Assuming that both birth and death rates are density and time dependent, a diffusion approximation of the generalized birth and death process has been considered in this paper to obtain a suitable stochastic population model describing the population size and its moments. A simple method of estimating the parameters of the model Is discussed. The predictions of the expected size of the population, and the variance are made and compared with the corresponding census figures as well as with another deterministic projection series made for the corresponding period.     

Bayes estimation of the trendparameter in random fields

Based on continuous observations of a random field and on the first two prior moments of the trendparameter is derived. essentially by use of the solution of a WIENER-HOFF-type integral equation.     

Parental Authority in Divorced Families

This work examines the possible differences between divorced mothers and mothers of intact families in their inclinations to exert parental authority, and the possible relationship between the degree of parental authority and children's personal and social adjustment. For the purposes of the study, we developed the Haifa Parental Authority Questionnaire, which is a situation-depicted test based on a conceptual analysis of the construct of authority. The participants were 88 mother–child dyads, 56 from single (divorced) families and 32 from two-parent families. The results show that married mothers are more disposed than are divorced mothers to use their authority. Although adding family status and parental authority scores to the regression analysis yielded insignificant models for the two children's adjustment variables, the interaction between the variables was found to be significant. In the divorced family the more authoritarian the mother is, the worse is the child's personal adjustment, whereas in the intact family the more authoritarian the mother is, the better is the child's social adjustment. The results are discussed in the wider context of the mother–child relationship, the breakdown of the family's hierarchical structure following divorce, and the relationship of these factors with the exertion of parental authority.