54:20832 Biswas,
Suddendhu; Pachal, Tapan K. A multistate Markov chain
model for evaluating a sterilization policy. Biometrical
Journal/Biometrische Zeitschrift, Vol. 29, No. 1, 1987. 57-64 pp.
Berlin, German Democratic Republic. In Eng.
"A multistate Markov
chain model corresponding to varying fertility and mortality rates at
different levels of surviving children of a couple was developed.
Asymptotic probabilities of having a fixed number of children have been
worked out." The implied geographical focus is on
India.
Correspondence: S. Biswas, Department of
Mathematical Statistics, University of Delhi, Delhi 110 007, India.
Location: U.S. National Library of Medicine, Bethesda, MD.
54:20833 Bloom,
David E. On the nature and estimation of age, period and
cohort effects in demographic data. Genus, Vol. 43, No. 1-2,
Jan-Jun 1987. 59-68 pp. Rome, Italy. In Eng. with sum. in Fre; Ita.
"This paper develops a general procedure for estimating age,
period, and cohort effects in demographic data. The procedure involves
structuring, mathematically, the effect of cross-cohort changes in the
timing and level of a vital event on period rates of occurrence of the
event. The procedure is illustrated and tested in an application to
data on the first birth rates of [U.S. women from 1917 to 1980].
Overall, the empirical results provide support for the procedure. The
results also provide evidence that period effects are highly
age-specific and that the size of cohort effects may be substantially
overestimated by models which fail to allow for the age specificity of
period effects."
Correspondence: D. E. Bloom, Department of
Economics, Harvard University, Cambridge, MA 02138. Location:
Princeton University Library (SPR).
54:20834 Liu, Laifu;
Cohen, J. E. Equilibrium and local stability in a logistic
matrix model for age-structured populations. Journal of
Mathematical Biology, Vol. 25, No. 1, Apr 1987. 73-88 pp. Heidelberg,
Germany, Federal Republic of. In Eng.
"A logistic matrix model for
age-structured population dynamics is constructed. This model
discretizes a continuous, density-dependent model with age structure,
i.e. it is an extension of the logistic model to the case of
age-dependence. We prove the existence and uniqueness of its
equilibrium and give a necessary and sufficient condition for the local
stability of the equilibrium."
Correspondence: L. Liu,
Department of Mathematics, Beijing Normal University, Beijing, China.
Location: Princeton University Library (SK).
54:20835 Nanjo,
Zenji. Demographic data and spline interpolation.
Jinkogaku Kenkyu/Journal of Population Studies, No. 10, May 1987. 43-53
pp. Tokyo, Japan. In Jpn. with sum. in Eng.
Five formulas of spline
interpolation and their applications to demographic data are
introduced. "The formulas are applied to (1) interpolating and
smoothing values of life table functions....(2) interpolating births by
five-year age groups of mothers into single ages....(3) interpolating
cause-specific deaths by five-year age groups into single ages....[and]
(4) interpolating and smoothing two-dimensional demographic data e.g.
mortality rates and expectations of life by year and
age."
Correspondence: Z. Nanjo, Fukushima Medical College,
Fukushima City, Japan. Location: Princeton University Library
(SPR).
54:20836 Schoen,
Robert. Modeling multigroup populations. Plenum
Series on Demographic Methods and Population Analysis, ISBN
0-306-42649-8. LC 87-25714. 1988. xii, 308 pp. Plenum Press: New York,
New York/London, England. In Eng.
This book is concerned with the
application of a broad range of population models to the study of
changes in the social behavior of individuals and groups over time.
The primary approach is demographic rather than statistical.
"Organizationally, it is divided into three parts. Part I discusses
the basic, decrement-only, life table and its associated stable
population. Part II examines multistate (or increment-decrement)
models and provides the first comprehensive treatment of those
extremely flexible and useful life table models. Part III looks at
'two-sex' models, which simultaneously incorporate the marriage or
fertility behavior of males and females." The geographical focus is
worldwide.
Location: Princeton University Library (SPR).
