Assessing respondent-driven sampling: A simulation study across different networks

The purpose was to assess RDS estimators in populations simulated with diverse connectivity characteristics, incorporating the putative influence of misreported degrees and transmission processes. Four populations were simulated using different random graph models. Each population was “infected” using four different transmission processes. From each combination of population x transmission, one thousand samples were obtained using a RDS-like sampling strategy. Three estimators were used to predict the population-level prevalence of the “infection”. Several types of misreported degrees were simulated. Also, samples were generated using the standard random sampling method and the respective prevalence estimates, using the classical frequentist estimator. Estimation biases in relation to population parameters were assessed, as well as the variance. Variability was associated with the connectivity characteristics of each simulated population. Clustered populations yield greater variability and no RDS-based strategy could address the estimation biases. Misreporting degrees had modest effects, especially when RDS estimators were used. The best results for RDS-based samples were observed when the “infection” was randomly attributed, without any relation with the underlying network structure.     

2000—2010年广东省老年人口空间分布演变研究

根据2000年第五次人口普查数据、2010年第六次人口普查数据和相关社会经济统计数据,利用地理信息系统技术对广东省老年人口空间分布变化和特征进行分析,阐明导致该空间格局演变的主要原因,并据此提出完善养老服务的建议,主要包括：全面提高全省医疗卫生服务水平;经济落后的、老人比例较高的地区应完善公办老年公寓、托老所、老人活动中心等相关养老福利的落实;经济发达的、老人比例较低的地区除提供基本养老福利以外,还可以尝试新型老人居住模式,如旧社区适老性改造、商住—养老复合社区等。     

Estimation of the parameter of a dynamically selected population for two subclasses of the exponential family

We introduce the problem of estimation of the parameters of a dynamically selected population in an infinite sequence of random variables and provide its application in the statistical inference based on record values from a non stationary scheme. We develop unbiased estimation of the parameters of the dynamically selected population and evaluate the risk of the estimators. We provide comparisons with natural estimators and obtain asymptotic results. Finally, we illustrate the applicability of the results using real data.     

少数民族流动人口突发事件风险管理体系研究简

对少数民族流动人口突发事件风险管理体系进行探讨具有重要的现实意义；对其管理过程中的风险识别、评估、处置及善后审视等几个环节的操作过程进行考察，是研究其之关键因素。     

外来人口社会融合中文化与制度的影响研究——以浙江省为例

外来人口流入易融入难。论文通过探索性因子分析,将外来人口社会融合的因素划分为经济、社会公共服务制度、文化三个层面。浙江省是工业大省,外来人口在经济因素方面对社会融合的影响不大;而社会公共服务制度方面却对社会融合影响较大,应该为他们提供无差别的公共服务,解决制度方面的障碍;文化方面对社会融合的影响最大。     

Pre‐procreative ages in population stability and cyclicity

Age‐specific models of population renewal (with and without feedback) which imply convergence to a stable state for some levels of fertility or feedback may imply the presence of long‐term cycling around a constant or exponentially changing equilibrium for other levels of fertility or feedback. The switch from one regime to the other is a “bifurcation.”; The conditions for bifurcation involve the roots of an analogue of Lotka's Equation.

Typically bifurcation is induced by raising the strength of feedback or the level of fertility. It has been known since the early 1980s, however, that this is sometimes impossible. It is sometimes impossible even with the linear renewal equation itself and with the most basic of non‐linear models, Lee's cohort feedback model.

Here it is proved that this typical route to bifurcation does not fail for these basic models in the presence of a condition which always holds for realistic applications with higher organisms: the existence of a span of ages before the onset of fertility.

Specifically, a strictly positive lower bound on ages of procreation is proved to be sufficient to guarantee the existence of a rescaling of Lotka's Equation for which the real part of some complex root vanishes. This result holds for absolutely Lebesgue‐integrable (signed) net maternity functions on the positive real line and for absolutely summable (signed) net maternities on the positive integers.

It follows that Coale's rescaling device for the analysis of approach to stability in stable population theory can be implemented for all realistic human net maternity schedules. It also follows that the many special cases of the cohort feedback model throughout population biology will all generate persistent cycling instead of stability if feedback is sufficiently strong.     

甘肃省人口压力评估指标及定量评估研究

在对传统人口压力评价指标体系评述的基础上，将无形资源纳入人口压力评价指标体系，根据2006年甘肃省统计资料。对全省81个县级行政区划单位的人口压力进行赋值与量化。结果表明甘肃省人口压力量化值呈正态分布．有形资源与无形资源都丰富的地区人口压力较小，人口压力与社会经济发展水平密切相关。实现甘肃社会经济的可持续发展．必须注重人口压力区域差异的合理调控。     

城市人口密度、国内市场规模与就业增长

我国经济“高增长、低就业”现象的原因在于我国贸易成本过高，国内市场规模较少。解决我国就业问题的关键在于减少行政干预，顺应市场要求，促进人口在空间上的适度集中，提高人口密度，提高消费效率，扩大市场规模。应进一步完善城乡一体的户籍制度，完善整合城乡劳动力市场，提高要素流动能力等。     

西部人口与可持续发展

可持续发展要求有良好的人口环境。人口是西部可持续发展的首要问题。在西部发展中 ,制定积极的人口政策 ,控制人口、提高人口素质 ,为西部可持续发展创造良好的人口环境     

人口较少民族发展道路探析——以鄂温克民族为例

本文以鄂温克族为例,探析了人口较少民族发展的道路,分析总结了人口较少民族发展的重要经验。