古典管理中的人本管理思想

古典管理一直被认为是以物为本的管理。从古典管理的主要代表人物泰罗及其追随者的思想中发掘其中的人本管理思想 ,并分析比较他们的人本思想和当代人本思想的差异     

A Unified Approach to the Approximation of Multivariate Densities

Approximation of a density by another density is considered in the case of different dimensionalities of the distributions. The results have been derived by inverting expansions of characteristic functions with the help of matrix techniques. The approximations obtained are all functions of cumulant differences and derivatives of the approximating density. The multivariate Edgeworth expansion follows from the results as a special case. Furthermore, the density functions of the trace and eigenvalues of the sample covariance matrix are approximated by the multivariate normal density and a numerical example is given     

Problems with Maximum Likelihood Estimation and the 3 Parameter Gamma Distribution

The three parameters involved are scale a , shape 𝜌 , and location s . Maximum likelihood estimators are (\hata, \hat\rho, \hats) . Using recent work on the second order variances, skewness, and kurtosis we establish the facts, that if the location parameter s is to be estimated, then the asymptotic variances only exist if 𝜌 >2, asymptotic skewness only exists if 𝜌 >3, and 2nd order variances and third order fourth central moments only exist if 𝜌 >4. The result of these limitations is that in general very large sample sizes may be needed to avoid inference problems. We also include new continued fractions for the asymptotic covariances of the maximum likelihood estimators considered.     

A general approximation to quantiles

For many continuous distributions, a closed-form expression for their quantiles does not exist. Numerical approximations for their quantiles are developed on a distribution-by-distribution basis. This work develops a general approximation for quantiles using the Taylor expansion. Our method only requires that the distribution has a continuous probability density function and its derivatives can be derived to a certain order (usually 3 or 4). We demonstrate our unified approach by approximating the quantiles of the normal, exponential, and chi-square distributions. The approximation works well for these distributions.     

浪漫派诗歌关乎图征,还是象征——华兹华斯与柯尔律治的诗学思想比较

试图剖析华兹华斯与柯尔律治诗学理念格格不入的原因,提出浪漫派诗歌内部在图征和象征上的巨大差别,以及考察这两种古老的艺术手段对浪漫派诗歌在内容和形式上的创新和贡献。     

A semiparametric approach for modelling multivariate nonlinear time series

In this article, a semiparametric time‐varying nonlinear vector autoregressive (NVAR) model is proposed to model nonlinear vector time series data. We consider a combination of parametric and nonparametric estimation approaches to estimate the NVAR function for both independent and dependent errors. We use the multivariate Taylor series expansion of the link function up to the second order which has a parametric framework as a representation of the nonlinear vector regression function. After the unknown parameters are estimated by the maximum likelihood estimation procedure, the obtained NVAR function is adjusted by a nonparametric diagonal matrix, where the proposed adjusted matrix is estimated by the nonparametric kernel estimator. The asymptotic consistency properties of the proposed estimators are established. Simulation studies are conducted to evaluate the performance of the proposed semiparametric method. A real data example on short‐run interest rates and long‐run interest rates of United States Treasury securities is analyzed to demonstrate the application of the proposed approach. The Canadian Journal of Statistics 47: 668–687; 2019 © 2019 Statistical Society of Canada     

Testing equality of generalized variances of k multivariate normal populations

Generalized variance is a measure of dispersion of multivariate data. Comparison of dispersion of multivariate data is one of the favorite issues for multivariate quality control, generalized homogeneity of multidimensional scatter, etc. In this article, the problem of testing equality of generalized variances of k multivariate normal populations by using the Bartlett's modified likelihood ratio test (BMLRT) is proposed. Simulations to compare the Type I error rate and power of the BMLRT and the likelihood ratio test (LRT) methods are performed. These simulations show that the BMLRT method has a better chi-square approximation under the null hypothesis. Finally, a practical example is given.     

泰罗科学管理中的人本管理分析

泰罗科学管理理论产生已有100多年的历史,人们对该理论的评价也褒贬不一,很多人批评其建立在经济人假设的基础之上,“胡萝卜加大棒”式的管理严重摧残了人性;其实泰罗科学管理理论中的管理职能化思想和人力资源开发思想,就闪烁着人本管理的理性,也给后来的管理以积极的启示,依然具有重要的现实意义.     

货币政策规则的理论发展与启示

货币政策规则(尤其是"泰勒规则")自被提出以来,就深受关注,并在与"相机抉择"的政策决策原则的交锋中不断得到发展。现在的货币政策规则不再局限于货币当局设定固定的货币工具变量的狭隘涵义,而是指货币政策行为的一种指令性的向导,具体包括工具规则与目标规则。经济学家相信,与相机决策相比,规则性的政策能有效减少货币政策的动态不一致性。但是,现阶段在中国建立货币政策规则,尤其是实行通货膨胀目标规则的货币政策的条件并不成熟,而加快金融、财政和计划体制的改革,提高中央银行的独立性,增强政策的透明度,努力提高央行货币政策的一致性的信誉,则是我国的当务之急。