Immigrants,Refugees and Asylum Seekers

Abstract

This article reviews policies and services related to immigrants, refugees and asylum seekers in the U.S. Definitions of immigration categories are provided to clarify the context in which services operate. Particular attention is given to issues that are unique to populations of the Southwest. Historical information on this region is offered; immigration trends and recent statistics are presented. The article is based on published data; field interviews with personnel in selected immigrant and refugee serving social agencies are used to compliment the literature. The authors highlight the social consequences of the global phenomenon of migration, whether motivated by economic or political realities. Recommendations for those who serve immigrants, refugees and asylum seekers are offered.     

基于加权组合和最小二乘法改进的GM(2,1)模型

文章通过分析指出了GM(2,1)模型存在灰微分方程与白化方程无法匹配以及默认经过初始值点的缺陷;利用权值p1、p2对一阶灰导数和背景值进行加权组合,建立了GM(2,1)模型的一种改进形式--GM(2,1,p1,p2模型,利用最小二乘法确定系统最终参数.实例验证结果表明,改进GM(2,1)模型具有更高的预测精度.     

Comparing several experimental groups with a control in the multivariate case

This paper presents a multivariate extension of Dunnett's test for comparing simultaneously k treatment group means with a single control group mean. A test based on Hotelling T²statistics is presented and approximate critical values are evaluated for the case of equal numbers of observations in each group, for the .05 and .01 levels of significance, for 1 to 5 variates, for 1 to 10 treatment groups, and for varying degrees of freedom. The accuracy of the procedure for generating approximate critical values is assessed via simulation studies conducted for selected cases and an example is presented using real data.     

Finding environmentally important industry clusters: Multiway cut approach using nonnegative matrix factorization

This paper proposes an optimal combinatorial method for finding groups of industries with relatively large CO₂ emissions through industrial relations. Using an economic input–output table, we estimated a non-symmetric matrix describing how much CO₂ is emitted in producing the commodity of industry i, which was purchased to produce commodity of industry j, to meet the final demand for a specific commodity. A symmetric strength of relations matrix describing the CO₂ emissions associated with the industrial relations was further estimated using the non-symmetric matrix. The strength of relations matrix can be viewed as a representation of the supply-chain network of the final commodity. In this study, we estimated the strength of relations matrix associated with the final demand for automobiles and applied the multiway cut approach using nonnegative matrix factorization to the matrix in order to find environmentally important industry clusters in the Japanese automobile supply chain. According to our empirical results, the optimal number of industry clusters is 19, and 4 industry clusters are playing a key role in CO₂ emission reduction.     

Dependence function for continuous bivariate densities

The notion of cross-product ratio for discrete two-way contingency table is extended to the case of continuous bivariate densities. This results in the “local dependence function” that measues the margin-free dependence between bivariate random variables. Properties and examples of the dependence function are discussed. The bivariate normal density plays a special role since it has constant dependence. Continuous bivariate densities can be constructed by specifying the dependence function along with two marginals in analogy to the construction of two-way contingency tables given marginals and patterns of interaction. The dependence function provides a partial ordering on bivariate dependence.     

C2C卖家的诚信行为模式及其动态性研究

现有电子商务的信用评价体系单一维度的特点使得评级体系难以准确衡量、比较店铺在各维度之间的差异及其变化。为了提高C2C电子商务信用评级体系的信息揭示作用,本文试图从多维度指标分析店铺的诚信行为模式及其动态性。本文对淘宝7大行业不同信用等级的卖家的诚信指标数据进行聚类分析表明,店铺在动态评分、信用等级、好评率上分别具有六类不同的静态组合特征,信用积分在解释店铺诚信状态上弱于动态评分和好评率指标。动态模式分析表明,店铺的好评率、动态评分指标及其与同业行业比值会呈现出三个不同的组合变化趋势。最后本文提出对现有的评价体系改进,以体现店铺之间在模式上的差异,从而真实展现卖家的诚信水平。     

中国C2C交易市场电子服务质量对顾客忠诚的影响——以顾客满意和顾客价值为中介变量

通过构建整合性的理论研究模型，揭示了C2C交易市场电子服务质量、顾客满意、顾客价值以及顾客忠诚之间相互作用的机理。并对中国具有C2C网上购物经验的用户进行问卷调查，建立结构方程模型，采用验证性因子分析法实证检验研究假设。研究结果发现：（1）C2C网站的电子服务质量对顾客满意和顾客价值产生显著的正向影响；（2）C2C卖家的电子服务质量对顾客满意产生显著的正向影响，对顾客价值的影响不显著；（3）顾客满意和顾客价值都对顾客忠诚产生显著的正向影响；（4）确认了顾客满意和顾客价值在C2C交易市场电子服务质量和顾客忠诚之间的中介效应。根据研究结论对C2C交易网站和网上卖家提高电子服务质量和顾客忠诚提出一些富有决策指导意义的对策和建议。     

2012年镇江赛珍珠国际学术研讨会综述

2012年6月8日,历史文化名城镇江隆重举行赛珍珠诞辰120周年纪念活动暨赛珍珠国际学术研讨会,纪念这位中国人民的朋友.在这次研讨会上,大量赛珍珠研究的新方法、新思路以及新生力量呈现出来,研究思路较以前有很大拓宽,不仅仅局限在传统的文学研究领域,研究重点从对赛珍珠作品的研究转向多个方面.     

Using simulation methods for bayesian econometric models: inference,development and communication: some comments

We extend the average derivatives estimator to the case of functionally dependent regressors. We show that the proposed estimator is consistent and has a limiting normal distribution. A consistent covariance matrix estimator for the proposed estimator is provided.