Inference for non-probability samples under high-dimensional covariate-adjusted superpopulation model

Statistical Methods & Applications - Non-probability samples become increasingly popular in sampling survey with lower costs, shorter time durations and higher efficiencies. In the...     

Inventory Rationing in a Make‐to‐Stock System with Batch Production and Lost Sales

We address an inventory rationing problem in a lost sales make‐to‐stock (MTS) production system with batch ordering and multiple demand classes. Each production order contains a single batch of a fixed lot size and the processing time of each batch is random. Assuming that there is at most one order outstanding at any point in time, we first address the case with the general production time distribution. We show that the optimal order policy is characterized by a reorder point and the optimal rationing policy is characterized by time‐dependent rationing levels. We then approximate the production time distribution with a phase‐type distribution and show that the optimal policy can be characterized by a reorder point and state‐dependent rationing levels. Using the Erlang production time distribution, we generalize the model to a tandem MTS system in which there may be multiple outstanding orders. We introduce a state‐transformation approach to perform the structural analysis and show that both the reorder point and rationing levels are state dependent. We show the monotonicity of the optimal reorder point and rationing levels for the outstanding orders, and generate new theoretical and managerial insights from the research findings.     

Through gendered lens:explaining Chinese caregivers' task performance and care reward

The Chinese cultural norm of xiao, or filial piety, has long been held responsible for the practice of familial caregiving for older parents. Yet few explore the gendered nature of such a cultural practice in the current changing economic dynamics. Using data collected in 1997-1999 from 110 Chinese caregivers who were caring for physically dependent elder parents, this researcher explores the influence of changing economic conditions and Chinese cultural values in caregiver task performance and reward. Findings suggest that Chinese caregiving is highly gendered: Women are more likely to be unemployed and provide more personal care than men; sons are not more likely than daughters to provide financial assistance for parents. Chinese cultural values are playing an important role sanctioning caregiver task performance. Caregivers who believed in patrilocal norms provided more financial assistance; caregivers who reported higher social pressure provided more personal care. While the caregivers' report of social pressure is positively related to the caregivers' performance in personal care tasks, it is negatively related to caregiver reward. The author further explores the gendered implications for the changing economy and culture in China.     

高校二级学院领导体制的执行优化

高校二级学院管理体制贵在执行中的优化,执行优化需要深刻理解体制的内涵,在此基础上规范和优化执行环节,体制的执行优化同时在领导干部素质提升方面提出了更高的要求。     

奥巴马政府《核态势评估》报告评析

奥巴马政府在几度推迟之后终于于2010年4月6日公布了《核态势评估》报告。这一报告推迟出炉,其中蕴涵着诸多因素的牵制。这一报告在一定程度上是对后冷战时期克林顿政府和小布什政府所发布的评估报告的变革,它不仅修改了关于最大威胁对象的判断,而且回归了原有的核承诺;不仅限定了美国核使用的范围,而且表明了停止发展新型核武器的态度,更重要的是体现了"无核世界"的理念。但是由于美国并没有抛弃冷战思维,并没有改变追求核优势甚至霸权的目标,因此奥巴马的核战略并未发生根本性的变化。     

社会阶层流动视阈下的高等教育公平探析

我国社会阶层流动进入了以市场化为主动力、以产业结构调整带动的职业高级化为主轴、以内涵式流动为特征的常态流动阶段.高等教育在社会阶层良性流动中具有重要的促进作用.社会分层使高等教育在起点、过程和结果中产生不公平现象己成为社会现实.促进高等教育公平的重点是促进教育机会实现的平等,充分发挥政府的作用,建立促进高等教育公平的社会机制,促进社会阶层良性流动,实现经济社会可持续发展.     

价值与技术的辩证统一——我国公共行政改革取向与方法的行政哲学维度

从行政哲学维度来看,价值与技术的分离奠定了行政学独立的学科地位,但也成为当前公共行政理论与实践陷于困境的根源。我国公共行政价值与技术分割导致的困境集中反映在政府和社会两个层面。调整公共权力结构与运行方式,培育公民社会自治能力,重建公共行政伦理,实现公共行政价值与技术的辩证统一,是我国公共行政改革的必由之路。     

隐私权法的西风东渐与本土发展探析

尊重隐私是人类的普遍需求,对隐私进行法律保护已成为一种普遍趋势,但各国立法和司法对隐私的界定和保护的范围都有不同.随着新媒体技术的发展,原本就脆弱的隐私权遭到侵犯的可能性有增无减.而隐私权与知情权、大众传媒之间的关系历来一直是讨论隐私绕不开的话题.本文阐述了隐私权的产生背景、欧美及我国对隐私权保护的司法实践、隐私权与大众传媒的关系,以及新媒体时代给隐私权保护带来的新问题.     

城镇化进程中的制造业与物流业联动发展研究

我国城镇化建设进入到从规模扩张到质量提高的发展阶段,新的形势赋予了制造业与物流业联动发展的城镇化内涵和路径.在城镇化推进过程中,从互信互惠的发展理念、产业集群、合理有序的城市体系、信息化的智慧城市、城镇化的人口素质五个方面诠释了两业联动的内涵.通过对我国制造业与物流业耦合联动现状的分析,提出从营造平等发展氛围、产业集群与城市网络体系互动、信息管理水平、城镇化质量等方面进行两业联动发展路径的选择.     

Analysis of interval-grouped recurrent-event data using piecewise constant rate functions

We consider situations where subjects in a longitudinal study experience recurrent events. However, the events are observed only in the form of counts for intervals which can vary across subjects. Methods for estimating the mean and rate functions of the recurrent-event processes are presented, based on loglinear regression models which incorporate piecewise-constant baseline rate functions. Robust methods and methods based on mixed Poisson processes are compared in a simulation study and in an example involving superficial bladder tumours in humans. Both approaches provide a simple and effective way to deal with interval-grouped data.