n圆盘系统的固有频率的特征多项式

对等惯、等轴性且具有固定端的n圆盘系统的特征多项式进行了分析。得出了其系数与二项式系数的一个有趣的关系;并对特征值的取值进行了有关讨论;最后也给出了得到的三个组合恒等式。     

农村劳动力转移与山西现代农业驱动模式研究

运用协整回归和误差修正模型,以山西省为例,实证分析农村劳动力转移对现代农业的影响。结果表明,1996²011年,农村劳动生产率、财政支农资金比例和城镇化水平的对数与农村转移劳动力比例之间存在协整关系,且误差修正机制存在;β系数进一步表明农村转移劳动力对农业现代化的影响作用最大,并且前者是后者的Granger因。证实了现代农业驱动处于人口转移驱动型阶段,尚未进入城镇化驱动阶段。据此提出建议:继续积极鼓励和引导农村劳动力有序、健康转移;提高财政支农比例,提升财政支农资金运用效率;对城镇化模式进行科学动态调整,纠正城镇化偏差。     

论转化犯

转化性犯罪是刑法中一种普遍性现象,转化犯作为刑法的概念范畴为我国刑法理论学者首创.但是,各刑法理论学者对于转化犯的概念、特征及犯罪构成情况观点不一.转化犯不仅是我国刑事立法上概括的理论范畴,而且还是一种客观的犯罪事实现象,更是一种独立的刑法罪数形态理论体系,它有自己概念、特征、类型等基本范畴.我们的理论研究者不应该只是把它放在一种既定的规范解释层面来看待,更应该从罪数形态的理论模型来给予关怀.     

Maximum likelihood ridge displays

I illustrate likelihood methods for estimating the consequences of shrinkage along any ridge path as well as methods for picking a two-hyperparameter path of optimal curvature and the optimal point on that path. In addition to my published "classical" methods, I also illustrate both the empirical Bayes and the random coefficient maximum likelihood approaches. Traces of risks for known parameters and losses for simulated responses are followed by traces of estimates that can reveal the same general information.     

A test for gamma DFR alternative

In this article, a test for exponentiality against gamma DFR alternative based on a quadratic form of the logarithmic observations is proposed. The percentage points and the power of the test are computed through Monte-Carlo simulation. The test is seen to perform well as compared to a chi-square test proposed by Bain and Engelhardt(1975).     

The Relative Size of Windfall Income and the Permanent Income Hypothesis

A reconciliation is offered for the diverse test results on Friedman's permanent income hypothesis. A large data sample of those receiving windfall income in the Bureau of Labor Statistics' 1972–1973 Consumer Expenditure Survey is divided according to the size of the windfall relative to estimated permanent income. A pattern of a declining marginal propensity to consume windfall income as the relative size of the windfall increases is apparent. These results support the permanent income hypothesis for relatively large windfalls.     

Sieve Estimation of Time-Varying Panel Data Models With Latent Structures

We propose a heterogeneous time-varying panel data model with a latent group structure that allows the coefficients to vary over both individuals and time. We assume that the coefficients change smoothly over time and form different unobserved groups. When treated as smooth functions of time, the individual functional coefficients are heterogeneous across groups but homogeneous within a group. We propose a penalized-sieve-estimation-based classifier-Lasso (C-Lasso) procedure to identify the individuals’ membership and to estimate the group-specific functional coefficients in a single step. The classification exhibits the desirable property of uniform consistency. The C-Lasso estimators and their post-Lasso versions achieve the oracle property so that the group-specific functional coefficients can be estimated as well as if the individuals’ membership were known. Several extensions are discussed. Simulations demonstrate excellent finite sample performance of the approach in both classification and estimation. We apply our method to study the heterogeneous trending behavior of GDP per capita across 91 countries for the period 1960–2012 and find four latent groups.     

Inference on Overlap for Two Inverse Gaussian Populations: Equal Means Case

The inverse Gaussian distribution is often suited for modeling positive and/or positively skewed data (see Chhikara and Folks, 1989 Chhikara , R. S. , Folks , J. L. ( 1989 ). The Inverse Gaussian Distribution . New York : Marcel Dekker . [Google Scholar]) and presents an interesting alternative to the Gaussian model in such cases. We note here that overlap coefficients and their variants are widely studied in the literature for Gaussian populations (see Mulekar and Mishra, 1994 Mulekar , M. , Mishra , S. N. ( 1994 ). Overlap coefficients of two normal densities: equal means case . J. Japan. Statist. Soc. 24 : 169 – 180 . [Google Scholar], 2000 Mulekar , M. , Mishra , S. N. ( 2000 ). Confidence interval estimation of overlap: equal means case . Computat. Statist. Data Anal. 34 : 121 – 137 .[Crossref], [Web of Science ®] , [Google Scholar], and references therein for further details). This article studies the properties and addresses point estimation for large samples of commonly used measures of overlap when the populations are described by inverse Gaussian distributions. The bias and mean square error properties of the estimators are studied through a simulation study.     

Minimum average risk estimators for coefficients in linear models

We consider the problem of estimating the coefficient vector β of a linear regression model with quadratic loss function. Some biased estimators which utilize the prior information about β are considered. Also studied is the problem of estimating the parameters of an over-identified structural equation from undersized samples.