Suddhendhu; Ebraheem, Nather A. On a logistic process
oriented population model for the optimal growth rate of a
population. Genus, Vol. 44, No. 3-4, Jul-Dec 1988. 19-35 pp. Rome,
Italy. In Eng. with sum. in Fre; Ita.
The authors present a stochastic model to estimate maximum and minimum population growth rates. The model assumes a population that is converging toward stability while its growth pattern is determined by density-dependent fertility and mortality parameters. The model is tested using official data on the population of India.
Correspondence: S. Biswas, University of Delhi, Department of Statistics, Delhi 110 007, India. Location: Princeton University Library (SPR).
Gaston E. Dynamics of populations with age-difference and
diffusion: localization. Applicable Analysis, Vol. 29, 1988.
143-63 pp. London, England. In Eng.
"In this paper we study the behavior of the solutions of the Gurtin-MacCamy model for the dynamics of populations with [spatial] diffusion and age-dependence. We give sufficient conditions on the birth and death modules for the population to remain localized in a fixed interval or to ultimately cover all the domain."
Correspondence: G. E. Hernandez, University of Iowa, Department of Mathematics, Iowa City, IA 52242. Location: Princeton University Library (SM).
55:40669 Liao, Tim
F. A flexible approach for the decomposition of rate
differences. Demography, Vol. 26, No. 4, Nov 1989. 717-26 pp.
Alexandria, Virginia. In Eng.
"Conventional methods of decomposing the difference between two rates, such as Kitagawa's classic component analysis, are confined to taking the average of compositional differences. I propose a more general modeling approach involving three steps: (1) A system of equations with the various additive components of the rate difference is set up; (2) unknowns (refined rate differences) are estimated with Clogg's purging method; (3) the components are calculated. I use an example of U.S. mortality data to compare the proposed method with the conventional ones. The method can be generalized to decompositions for multiple groups and for multiple confounding factors. Kitagawa's method is a special case of this general approach."
Correspondence: T. F. Liao, University of Georgia, Department of Sociology, Athens, GA 30602. Location: Princeton University Library (SPR).
Holger. The study of interdependent social processes using
event history analysis: the method and its application to the example
of young women's employment and family careers. [Die Untersuchung
interdependenter sozialer Prozesse mittels Ereignisanalysen: die
Methode und ihre Anwendung am Beispiel von Berufs- und
Familienkarrieren junger Frauen.] IBS-Materialien, No. 28, ISBN
3-923340-21-4. 1988. 100 pp. Universitat Bielefeld, Institut fur
Bevolkerungsforschung und Sozialpolitik: Bielefeld, Germany, Federal
Republic of. In Ger.
The method of event history analysis is described and its use in studying the interdependence of social processes is discussed. An example is presented using data on employment and family formation among young women in North Rhine-Westphalia, West Germany. The data were collected between 1981 and 1986 and concern more than 1,000 women.
Correspondence: Universitat Bielefeld, Institut fur Bevolkerungsforschung und Sozialpolitik, Universitatsstrasse, D-4800 Bielefeld 1, Federal Republic of Germany. Location: Princeton University Library (SPR).
Oscar. The decomposition of data on children under five
years of age to single years of age based on population
projections. [Descomposicion del grupo de menores de 5 anos en
edades simples en base a las proyecciones de poblacion.] Notas de
Poblacion, Vol. 15, No. 45, Dec 1987. 67-81 pp. Santiago, Chile. In
Spa. with sum. in Eng.
A method to develop estimates of the population under age five by single years of age from data on five-year age groups normally available from population projections is described using Chilean data.
Correspondence: O. Moya, Centro Latinoamericano de Demografia, Edificio Naciones Unidas, Avenida Dag Hammarskjold, Casilla 91, Santiago, Chile. Location: Princeton University Library (SPR).
Oosterhaven, Jan. A prototype comparative static
demo-economic model for impact and projection studies. Institute
of Economic Research Memorandum, No. 240, Feb 1988. 15 pp. University
of Groningen, Faculty of Economics, Institute of Economic Research:
Groningen, Netherlands. In Eng.
The author proposes a simple, single-region, demo-economic household consumption model. The model is suited "for making projections of regional output, employment, unemployment and population at large. The projection of the regional labour force will simply equal the sum of employed and unemployed people. The model is also suited for impact studies."
Correspondence: University of Groningen, Faculty of Economics, Institute of Economic Research, P.O. Box 800, 9700 AV Groningen, Netherlands. Location: Princeton University Library (SPR).
Tonu. On growth and dispersal of population. Annals
of Regional Science, Vol. 23, No. 3, Oct 1989. 171-86 pp. New York, New
York/Berlin, Germany, Federal Republic of. In Eng.
A revised model of population growth and diffusion is presented. The model, originally developed by H. Hotelling in 1921, was extended by the present author in 1985 to include an explicit production function. The revised model proposed here avoids the problem in the original model caused by the fact that the stationary solutions are periodic and dip into negative populations.
For a related study, published in 1985, see 51:40665.
Correspondence: T. Puu, University of Umea, Department of Economics, S-90187 Umea, Sweden. Location: Princeton University Library (PF).
Yu. An alternative purging method: controlling the
composition-dependent interaction in an analysis of rates.
Demography, Vol. 26, No. 4, Nov 1989. 711-6 pp. Alexandria, Virginia.
"The purging method controlling for the composition-group interaction developed by Clogg and his associates has proven useful in demographic research. This article proposes an alternative method, partial CD purging, that controls the interaction between composition and the dependent variable. The purged rates from this new method are invariant to changes in the marginal distribution of composition, but those from the earlier purging method are not. Mathematical relationships between the proposed method and other techniques are also explored."
Correspondence: X. Yu, University of Michigan, Population Studies Center, 1225 South University Avenue, Ann Arbor, MI 48104. Location: Princeton University Library (SPR).