Approximate estimation in nonlinear panel data models

This paper is concerned with the estimation of a general class of nonlinear panel data models in which the conditional distribution of the dependent variable and the distribution of the heterogeneity factors are arbitrary. In general, exact analytical results for this problem do not exist. Here, Laplace and small-sigma appriximations for the marginal likelihood are presented. The computation of the MLE from both approximations is straightforward. It is shown that the accuracy of the Laplace approximation depends on both the sample size and the variance of the individual effects, whereas the accuracy of the small-sigma approximation is 0(1) with respect to the sample size. The results are applied to count, duration and probit panel data models. The accuracy of the approximations is evaluated through a Monte Carlo simulation experiment. The approximations are also applied in an analysis of youth unemployment in Australia.     

A comparison of test statistics for the recovery of rapid growth‐based enumeration tests

This paper considers five test statistics for comparing the recovery of a rapid growth‐based enumeration test with respect to the compendial microbiological method using a specific nonserial dilution experiment. The finite sample distributions of these test statistics are unknown, because they are functions of correlated count data. A simulation study is conducted to investigate the type I and type II error rates. For a balanced experimental design, the likelihood ratio test and the main effects analysis of variance (ANOVA) test for microbiological methods demonstrated nominal values for the type I error rate and provided the highest power compared with a test on weighted averages and two other ANOVA tests. The likelihood ratio test is preferred because it can also be used for unbalanced designs. It is demonstrated that an increase in power can only be achieved by an increase in the spiked number of organisms used in the experiment. The power is surprisingly not affected by the number of dilutions or the number of test samples. A real case study is provided to illustrate the theory. Copyright © 2013 John Wiley & Sons, Ltd.     

中国红十字会救护总队部的"林可胜时期"(下)

救护总队部的“林可胜时期”(1938～1942年),是中国红十字会抗战救护最辉煌的时期。文章依据档案、当时的报刊、文献、口述历史资料及该会内部资料,考察了中国红十字会救护总队部的组建、空间及内部组织结构变迁、与卫训总所的关系以及“内部风潮”的潜滋暗长对抗战救护事业的多元效应,弥补了相关研究的不足。     

南京市失业人口状况分析

根据"五普"南京市人口10%抽样调查数据,对南京市失业人口状况作了统计分析.分析结果表明,失业人口约占"非在业人口"的1/10略多,其中近2/3为"寻求再就业"人员.人口抽样失业率为6.08%,城区失业率较高,老城区人口失业问题更严重.15～25岁初次寻求就业和40～45岁寻求再就业的群体为两个"就业困难年龄段".女性群体在就业上处于明显弱势,其中25～45岁女性失业比例显著高于男性.但在初次寻找工作中,年轻男性碰到的困难大于年轻女性,而在失业后寻求再就业过程中,女性的困难远高于男性.     

热印多层次图像的热印头电阻值离散性校正

研究了影响热敏图像层次的主要因素。通过对实验数据的分析，提出了热印头热印电阻值离散性校正的软件和硬件实施方法。     

护士长的管理理念和管理艺术

为了提高护士长的管理技巧,医院的护理部要在医院管理中,对全院护士长进行护士长管理技巧的培训。采取的方法有:外请专家讲课、集体培训、跟班指导、个别交谈的方式,这样,会使护士长的管理技巧迅速提高,成为适应医疗改革中的合格管理者。     

歌唱行腔过程中语言的特点及运用

从汉语的语音结构特点出发，分别从字头、字腹、字尾三个方面阐述在声乐的演唱过程中，怎样按照汉语拼音的声母、韵母和韵尾的固有特点去学习掌握咬字、吐字和运字行腔的方法和规律真正做到字正腔圆、声情并茂。     

医学图像分析技术及其应用的研究

信息图像化是一个受到广泛重视的研究课题,而图像的定量分析关系到图像中所包含的信息能否被很好的提取和利用.本文介绍了图像分析技术的原理及过程,着重介绍了自行研制的图像分析仪的应用实例.     

“10”在数制转换中的妙用

数制是计算机应用学习的一个关键和难点,本文巧妙地运用“10”来解决这一问题。     

Algorithms Section: Introduction

Electronic Access to Algorithms
Applied Statistics algorithms are available on Statlib at Carnegie Mellon University and on the UK mirror of Statlib at the University of Kent. They may be accessed either via anonymous file transfer protocol (FTP) or by WWW mosaic.