An age-structured model of population dynamics with dominant ages, delayed behavior, and oscillations [0.03%]
具有主导年龄，延迟行为和振荡的年龄结构种群动态模型
T Kostova,F A Milner
T Kostova
"An age-structured model of population dynamics with age-dominance is proposed and analyzed. Existence and uniqueness of solutions are established as well as the uniqueness and local asymptotic stability of steady-states. Conditions for con...
H Schmidbauer,A Rosch
H Schmidbauer
"We consider a Leslie-type model of a one-sex (female) population of natives with constant immigration. The fertility and mortality schedule of the natives may be below or above replacement level. Immigrants retain their fertility and morta...
Survival of related individuals: an extension of some fundamental results of heterogeneity analysis [0.03%]
亲属个体的生存情况：异质性分析一些基本结果的延伸
A I Yashin,I A Iachine
A I Yashin
"Many ideas in the analysis of heterogeneous mortality are based on the relationship between individual and observed hazard rates. This connection is established with the help of conditional averaging procedure: The observed risk of death a...
Are mortality projections always more pessimistic when disaggregated by cause of death? [0.03%]
按死亡原因分解的死亡率预测总是更悲观吗？
J R Wilmoth
J R Wilmoth
"It is often observed that mortality projections are more pessimistic when disaggregated by cause of death. This article explores the generality and strength of this relationship under a variety of forecasting models. First, a simple measur...
Marriage selection and age patterns of mortality: a mathematical investigation [0.03%]
婚姻选择与死亡年龄模式：一项数学研究
N Goldman,G Lord,Y Hu
N Goldman
"In this paper, we use simulation models to demonstrate the complexity of the relationship between the marriage selection process and the resulting RMRs [relative mortality ratios]. In particular, we show that marriage selection alone can p...
A method of estimating the time of marital fertility decline and associated parameters [0.03%]
估计婚姻生育率下降的时间及相关参数的方法
D Friedlander,M Pollak,J Schellekens
D Friedlander
Sensitivity analysis in a multidimensional demographic projection model with a two-sex algorithm [0.03%]
两性算法多维人口预测模型的敏感性分析
P Ekamper,N Keilman
P Ekamper
"Formulas are derived for the effect that a slight change in the occurrence/exposure rate of the multidimensional projection model has on the elements of the population vector. The projection model classifies the population by sex, age, and...
Y J Kim,R Schoen
Y J Kim
"In this paper, we consider crossovers of demographic density distributions from...populations that have the same fertility and mortality rates. We focus on observed populations and their associated stationary and stable models, and on prop...
Y Hsieh
Y Hsieh
The author presents a method for estimating the age distribution of a population under varying vital statistics. "Some mathematical aspects of the method, as well as its applicability, will be discussed and numerical simulation will be run ...
A Kostaki
A Kostaki
"In this paper we outline and evaluate a nine-parameter version of the Heligman-Pollard formula. In our applications, using mortality data for five European countries we found that this version provides closer fits to empirical mortality da...