Results 281 to 290 of about 8,235,165 (300)

Cohort Replacement and Homeostasis in World Population, 1950–2100

Population and Development Review, 2013
Using a simple empirical approach, we analyze world and regional‐level cohort replacement as determined by the key components of population dynamics, i.e. fertility, survival, and migration, for 1950–2010, using UN data. We define two kinds of homeostatic relationships among these components: fertility responses to mortality change (type I) and ...
BILLARI, FRANCESCO CANDELORO, Dalla Zuanna, Gianpiero   +1 more
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Stochastic Equilibria in Nonhomogeneous Markov Population Replacement Processes

Mathematics of Operations Research, 1994
This paper is an exposition on the dynamic stochastic equilibria in multi-type time dependent Markov population processes for different types of environmental behaviour. The joint multivariate cumulant generating function of the various population sizes at any time is derived together with the covariance structure both with and without time lags.
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“Replacement Migration”: The UN Population Division on European Population Decline

Population and Environment, 2001
The imminent decline of populations in Europe, Japan and South Korea has generated widespread apprehension, largely because of fears that there will not be enough working age people to support the elderly. The UN Population Division has seemed to endorse those fears by an analysis of the levels of immigration needed to provide a constant number or ...
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On Random Sampling Without Replacement from a Finite Population

Annals of the Institute of Statistical Mathematics, 2001
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Kochar, Subhash C., Korwar, Ramesh
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The UN Population Division on Replacement Migration

Population and Development Review, 2000
The most salient demographic trend pictured by the influential set of population projections prepared by the Population Division of the United Nations (a unit in the UN's Department of Economic and Social Affairs) is the continuing substantial increase—albeit at a declining rate—of the global population during the coming decades.
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Methods for replacement of malaria vector populations.

The Journal of tropical medicine and hygiene, 1988
The prospects are reviewed of replacement of malaria vector populations by harmless mosquito populations by means of: (i) ecologically competitive non-vector species; (ii) natural selection due to the harmfulness of being infected; (iii) selection for insecticide resistance genes; (iv) meiotic drive; (v) negative heterosis; and (vi) hybrid dysgenesis ...
C F, Curtis, P M, Graves
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Sequential Sampling of Finite Populations with and without Replacement

SIAM Journal on Applied Mathematics, 1973
Items are drawn sequentially, at random, from a population of n items, either with replacement (WR) or without replacement (WOR) until one of a set of specified configurations is first observed in the sample. We study relations between two distributions of stopping time, namely that under sampling WR and that under sampling WOR.
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Dixie cups: sampling with replacement from a finite population

Journal of Applied Probability, 1994
At which (random) sample size will every population element have been drawn at least m times? This special coupon collector's problem is often referred to as the Dixie cup problem. Some asymptotic properties of the Dixie cup problem with unequal sampling probabilities are described.
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Replacement level fertility and future population growth.

Population trends, 1995
'Replacement level fertility' is a technical term which seems almost self-explanatory. However there are some important qualifications which make it a more difficult concept than might be supposed. Also, the relationship between replacement level fertility and zero population growth is complicated.
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POPULATION REPLACEMENT ‐ AUSTRALIA, 19471

Economic Record, 1949
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