《新纲》与《旧纲》词表轻声词条的衔接问题

与《普通话水平测试大纲》相比,《普通话水平测试实施纲要》在轻声词条的处理上体现出精简、宽松的原则。两纲在轻声词条衔接上的难点问题是有共同“两读音节”的“两读词条”,这类“两读词条”可通过它们所共有的“两读音节”进行联想记忆。     

ON THE PERFORMANCE OF KOLMOGOROV-SMIRNOV TESTS ON STABLE RANDOM VARIABLES1

This paper provides two procedures to perform the Kolmogorov–Smirnov (K-S) tests on stable random variables. One utilizes the integral representation of the cumulative distribution function of this random variable to perform the K-S test; the other utilizes the Gil-Pelaez-Roseń transformation of data (Csörg(1983)) to test uniformity on (0,1) for the transformed sample. Both procedures are examined and evaluated by a simulation study.     

A cusum test in the linear regression model with serially correlated disturbances

This paper considers a modified CUSUM test, suggested by Dufour (1982) for parameter instability and structural change with an unknown change point in a linear model with serially correlated disturbances, in which a preliminary estimate of the autoregressive coefficient for the error process is obtained, and used to transform the data. Then the standard CUSUM statistic is calculated on the transformed data. This paper derives the asymptotic distribution of the modified CUSUM test. We show that the modified CUSUM test retains its asymptotic significance level, i.e., the modified CUSUM test has the same asymptotic distribution as the CUSUM test with serially uncorrelated errors.     

"单位制"变革与城市社会成员的贫富分化

"单位制"是新中国成立以来中国城市社会普遍实行的一种组织制度和管理制度.在完全的单位体制下,城市社会成员的收入差距受到了国家的严格控制,整体呈现出一种平均主义的特征.随着改革的深入,一方面,单位组织在分配国家资源方面仍然处于主导地位;另一方面,单位组织的利益型特征逐渐突出.单位组织自身的状况(内生性因素)以及其与社会的联系(外生性因素)成为影响城市社会成员贫富分化的重要因素.在单位制变革的过程中应当控制过高的贫富差距,体现公平与效率的统一,维护社会稳定,促进社会发展.     

利用根冠滨粉水解法鉴定五种牧草的抗旱性及耐热性

利用根冠淀粉水解法测定老芒麦、披碱草、肥披碱草、加拿大披碱草、无芒雀麦的抗旱性及耐热性，结果表明：肥披碱草的根冠淀粉水解率明显小于其他品种。牧草在不同胁迫条件下根冠细胞中淀粉位的水解率与品种的抗旱性、耐热性关系极为密切，水解率低的抗旱性、耐热性要强，所以肥披碱草的抗旱性及耐热性比其他品种强。从平均水解率来看：肥披碱草０．５３＜披碱草０．６１＜老芒麦０．６４＜无芒雀麦０．７４＜加拿大披碱草０．７８，所以五种牧草抗旱性及耐热性的强弱应为：肥披碱草＞披碱草＞老芒麦＞无芒雀麦＞加拿大披碱草。     

Testing homogeneity of difference of two proportions for stratified correlated paired binary data

In ophthalmologic or otolaryngologic study, each subject may contribute paired organs measurements to the analysis. A number of statistical methods have been proposed on bilateral correlated data. In practice, it is important to detect confounding effect by treatment interaction, since ignoring confounding effect may lead to unreliable conclusion. Therefore, stratified data analysis can be considered to adjust the effect of confounder on statistical inference. In this article, we investigate and derive three test procedures for testing homogeneity of difference of two proportions for stratified correlated paired binary data in the basis of equal correlation model assumption. The performance of proposed test procedures is examined through Monte Carlo simulation. The simulation results show that the Score test is usually robust on type I error control with high power, and therefore is recommended among the three methods. One example from otolaryngologic study is given to illustrate the three test procedures.     

基于联立方程模型的公司治理溢价研究——兼谈如何检验公司治理评价指标的有效性

公司治理溢价研究可以揭示公司治理与企业价值之间的互动机理,不仅有助于深化和丰富公司治理理论,为上市公司优化公司治理指明方向和重点,而且有助于投资者全面评估企业价值.而对公司治理的客观评价是公司治理溢价研究中的关键问题,本文在以往研究成果基础上,以上证公司治理板块的评选结果为参照样本,给出了检验公司治理评价指标有效性的科学方法,进而验证了以DEA方法构建的公司治理效率值指标的有效性;在此基础上利用联立方程模型对公司治理溢价进行研究,解决了公司治理与企业价值之间可能存在的内生性问题;以2007年中国沪市578家A股公司为样本对联立方程模型进行估计.结果表明,中国股票市场存在公司治理溢价,公司治理效率值每增加0.1,流通盘市场附加值就会有37.2%的溢价.