Smoothing techniques via the bezier curve

Although the Bezier curve is very popular in the area of computational graphics it has rarely been used by statisticians. In this paper we develop methods and techniques for use of the Bezier curve in estimation of density and regression function. Also, asymptotic mean integrated square error for both estimators are derived. Comparisons with kernel estimator are conducted using simulation.     

The power series distribution wite unknown truncation parameter: Two sample problem

The uniformly most powerful unbiased tests are formulated for the two sample problem of the power series distribution with unknown truncation parameter.     

Point estimation after early stopping in a repeated measures trial

When the individual measurements are statistically independent, the maximum likelihood estimator calculated at the end of a sequential procedure overestimates the underlying effect. There are many clinical trials in which we are interested in comparing changes in responses between two treatment groups sequentially. Lee and DeMets (1991, JASA 86, 757–762) proposed a group sequential method for comparing rates of change when a response variable is measured for eaeh patient at successive follow-up visits. They assumed that the response follows the linear mixed effects model and derived the asymptotic joint distribution of the sequentially computed statistics. In this article, we consider the maximum likelihood estimator (MLE), the median unbiased estimator (MUE) and the midpoint of a 100(1-α)% confidence interval as point estimators for the rate of change in the linear mixed effects model, and investigate their properties by Monte Carlo simulation.     

Kullback–Leibler information of a censored variable and its applications

In this paper, we study the Kullback–Leibler (KL) information of a censored variable, which we will simply call it censored KL information. The censored KL information is shown to have the necessary monotonicity property in addition to inherent properties of nonnegativity and characterization. We also present a representation of the censored KL information in terms of the relative risk and study its relation with the Fisher information in censored data. Finally, we evaluate the estimated censored KL information as a goodness-of-fit test statistic.     

Friends or Enemies?: Generational Politics in the Korean American Community in Los Angeles

This paper examines generational politics in the Korean American community in Los Angeles. After outlining how the Immigration Act of 1965 led to the acceleration of generational transition in the contemporary immigrant experience, the paper focuses its attention on the entry of the post-immigrant generation into Korean American community politics. Relying on interviews and case studies, the entry of the post-immigrant generation is examined both as a source of new political resources for community mobilization as well as a new source of intra-community conflict. As greater numbers of the post-immigrant generation reach adulthood and become active in political affairs, the issue of generational politics will play an increasingly important role for shaping not only the political developments in immigrant communities but also the broader politics of the American society.     

Intergenerational Coresidence and Nearness in Korea and Japan: Unbalanced Aspects of Family Changes

Abstract  This study aims to explain similarity and difference in geographic proximity between elderly parents and their children in Korea and Japan. Using data sets from two nationally representative surveys conducted in Korea and Japan, this study examines the extent to which needs and kinship of elderly parents and regional constraints influence intergenerational coresidence and nearness.
Results highlight a complex feature of intergenerational relationship in Korea and Japan. Advanced economic and health conditions of Korean elderly parents increase the likelihood of living with children. For Japanese elderly parents, however, coresidence with children is significantly likely to occur in response to their disadvantaged economic status. These results suggest that the elderly Korean are more likely than the elderly Japanese to lack not only economic and health resources but also opportunities in obtaining family support in a time of need.
Characteristics of children, however, show a similar trend between the two societies. Both societies maintain a strong son preference for extended family living arrangement. Eldest children in both societies are more likely than their siblings to live with or near elderly parents. However, children of younger cohorts in both societies are significantly more likely than those of older cohorts to maintain a disperse geographic network indicating a significant change in family attitude among different cohorts.
Finally, this study finds a more disperse family network among rural elderly parents than urban elderly parents in both societies reflecting the fact that massive rural-to-urban migration of young population has contributed to geographic segregation of kinship in these societies.     

中国农村贫困人口的估计与瞄准问题

随着农村低保的全面实施,中国的农村扶贫从开发式扶贫为主转变为扶贫开发与最低生活保障并重,扶贫资源也大幅度增加.然而,这一政策转变似乎没有带来明显的减贫效果.我们的研究发现,由于数据基础和估计方法不同,国家统计局估计的贫困人口和民政部门确定的低保人口在很大程度上是两个不同的群体.国家统计局估计的是经济上的贫困人口,而这些贫困人口绝大部分有劳动能力.民政部门确定的农村低保人口主要是一些特殊的人群(残疾人、慢性病人等没有劳动能力的人口).这些人口中的相当部分的收入水平并不低于贫困线.中国需要建立统一的贫困人口识别机制,改善农村扶贫对象的选择和瞄准机制,以提高扶贫效果.     

The workhouse populations of Lancashire in 1881

This article investigates the characteristics of the workhouse populations in Lancashire in 1881. The analysis is based on the snapshot view provided by the 1881 census and, despite the limitations of such an approach, this large-scale survey reveals significant variations in the experience of poverty and local relief policies in a largely industrial region that had been at the forefront of the anti-poor law movement. The workhouse populations are shown to be diverse, and contrast markedly with pauper populations previously studied. Lancashire's Poor Law Unions are divided into three types: conurbation, urban industrial and rural. These three groups appear to represent three different patterns of workhouse residency. The workhouse populations in rural Lancashire are broadly similar to those discussed elsewhere, being dominated by elderly males. However, urban industrial workhouse populations contained large numbers of adults of working age and the absence of children from workhouses in the conurbation is particularly striking.