Same-Sex Sexuality and Educational Attainment: The Pathway to College

Research finds lower levels of academic performance among sexual minority high school students, but some studies suggest sexual minorities have higher levels of educational attainment in adulthood. To further our understanding of how and why sexual orientation is associated with educational success, this study turns attention to the pathways to college completion, examining points along educational trajectories in which sexual minorities fall behind or surpass their heterosexual peers. Using data from the National Longitudinal Study of Adolescent to Adult Health, we find that sexual minority women are less likely than women with no same-sex sexuality to complete college, in part due to their high school performance and transition into college. Men who experience same-sex sexuality only in adolescence struggle in high school, but men who experience same-sex sexuality for the first time in adulthood are more likely to earn a college degree than men who do not experience same-sex sexuality.     

论科学证据的两种概率解释

在科学证据研究中,存在＂正相关＂和＂高概率＂两种科学证据的概率定义。从这两个定义出发,能够比较清晰直观地解释科学证据的许多相关问题,如科学证据中的＂比较级＂和＂可接受性＂等。然而,两个定义自身存在着不可忽视的缺陷：＂正相关＂不是证据的充要条件,＂高概率＂也不足以使证据之为证据。     

Data envelopment analysis in the presence of measurement error: case study from the National Database of Nursing Quality Indicators® (NDNQI®)

Data envelopment analysis (DEA) is the most commonly used approach for evaluating healthcare efficiency [B. Hollingsworth, The measurement of efficiency and productivity of health care delivery. Health Economics 17(10) (2008), pp. 1107–1128], but a long-standing concern is that DEA assumes that data are measured without error. This is quite unlikely, and DEA and other efficiency analysis techniques may yield biased efficiency estimates if it is not realized [B.J. Gajewski, R. Lee, M. Bott, U. Piamjariyakul, and R.L. Taunton, On estimating the distribution of data envelopment analysis efficiency scores: an application to nursing homes’ care planning process. Journal of Applied Statistics 36(9) (2009), pp. 933–944; J. Ruggiero, Data envelopment analysis with stochastic data. Journal of the Operational Research Society 55 (2004), pp. 1008–1012]. We propose to address measurement error systematically using a Bayesian method (Bayesian DEA). We will apply Bayesian DEA to data from the National Database of Nursing Quality Indicators^® to estimate nursing units’ efficiency. Several external reliability studies inform the posterior distribution of the measurement error on the DEA variables. We will discuss the case of generalizing the approach to situations where an external reliability study is not feasible.     

摩天时代背景下当代城市建设的反思

摩天大楼成为近年来中国城市建设的重要特征。摩天大楼时代到来的同时，也带来了高楼建筑的社会问题，如安全问题、能原消耗问题、投资风险等。欧洲城市在建造高楼方面，保持了克制与理智的态度，欧洲国家纷纷制定各种法令限制摩天大楼的建设。作为河北省省会城市，2008年开始的“三年大变样”，使石家庄的城市建设步入摩天时代。2012年，石家庄市城乡规划局出台了《石家庄市城市风貌特色管理暂行规定》，石家庄将加强城市风貌特色管理，提高城市品位。人与高楼的和谐共融才是城市建筑存在的重要意义，如此，高楼大厦才会有灵魂，城市才会有未     

On an asymptotic relative efficiency concept based on expected volumes of confidence regions

ABSTRACT

The paper deals with an asymptotic relative efficiency concept for confidence regions of multidimensional parameters that is based on the expected volumes of the confidence regions. Under standard conditions the asymptotic relative efficiencies of confidence regions are seen to be certain powers of the ratio of the limits of the expected volumes. These limits are explicitly derived for confidence regions associated with certain plugin estimators, likelihood ratio tests and Wald tests. Under regularity conditions, the asymptotic relative efficiency of each of these procedures with respect to each one of its competitors is equal to 1. The results are applied to multivariate normal distributions and multinomial distributions in a fairly general setting.     

医学人文教育与高等中医药人才培养

高等中医药人才培养必须坚持医学科学精神与医学人文精神的统一,实现医学人才医学技术与人文关怀的协调发展。中医人文教育既是医学模式发展的根本要求,也是增进医患互信、构建和谐医患关系的需要。中医人文教育必须以培养高等中医人才为核心,遵循中医人才成长规律,体现人文教育与政治教育、人文精神与科学精神、文化传承与借鉴创新的高度统一,全面提升中医大学生的人文素养。     

Testing dominance of biometric functions

The hazard rate (HR) and mean residual lifetime are two of the most practical and best-known functions in biometry, reliability, statistics and life testing. Recently, the reversed HR function is found to have interesting properties useful in additional areas such as censored data and forensic science. For these three biometric functions, we propose testing methods that they take on a known functional form against that they dominate or are dominated by this known form. This goodness-of-fit-type testing is wider in applications and more interesting than the long-standing testing procedures for exponentiality against the monotonicity of these functions or even the change point problems. This is so since we can test against any choice of the survival distribution and not just exponentiality. For this general testing, we present easy to implement tests and generalize them into classes of statistics that could lead to more powerful and efficient testing.     

高新企业并购中的人力资源整合管理

在产业升级、结构调整以及经济一体化等因素的推动下,我国高新技术企业的并购规模和数量一直呈现不断上升趋势,并购的地域范围不再限于国内,全球范围的并购案例也迅速增长。越来越多的高新技术企业寻求通过并购方式来提高企业核心竞争能力,谋求企业的可持续发展。然而,并非所有的并购都能成功。     

Seemingly unrelated systems of econometric equations

A generalization of Zellner's SUR model is derived for sets of seemingly unrelated systems of econometric equations. The resulting structural form – worked out for a set of Cowles Commission-type simultaneous equations systems – is general enough to include any SUR-type or panel-type specification of systems of econometric equations with contemporaneously correlated errors. Maximum estimation efficiency is obtained by treating all the individual subsystems at once rather than in a subsystem-by-subsystem fashion.     

河南省生产率进步及其因素分解——基于DEA-Malmquist指数的市级数据分析

运用DEA．Malmquist指数分析法对18个市2000-2009年间的全要素生产率进步及其因素分解分析的结果表明：河南各市全要素生产率增长十分强劲，年均达14．7％，且落后地区具有明显的追赶趋势，但近几年下滑趋势明显。进一步的实证分析说明，技术进步是推动全要素生产率增长的主要动力，而综合技术效率和纯技术效率的下降则是制约TFP提升的瓶颈因素。因此，要遏制全要素生产率的下滑势头，就必须大力推进科技进步、提升技术效率和规模效率。