明清回族进士考略(一)

本文简略考证了明清时期顺天府、直隶所属州县 29位回族进士的生平、事迹,重点提供了他们为回族的根据,以为进一步深入研究的线索。     

Subset Selection Toward Optimizing the Best Performance at a Second Stage

In the search for the best of n candidates, two-stage procedures of the following type are in common use. In a first stage, weak candidates are removed, and the subset of promising candidates is then further examined. At a second stage, the best of the candidates in the subset is selected. In this article, optimization is not aimed at the parameter with largest value but rather at the best performance of the selected candidates at Stage 2. Under a normal model, a new procedure based on posterior percentiles is derived using a Bayes approach, where nonsymmetric normal (proper and improper) priors are applied. Comparisons are made with two other procedures frequently used in selection decisions. The three procedures and their performances are illustrated with data from a recent recruitment process at a Midwestern university.     

Der Sequentieile Quotiententest bei irreduziblen homogenen Markovschen Ketten mit endlichem Zustandsraum

The Sequential Probaility Ratio Test is applied to test two simple hypotheses about the transition probability matrix of an irreducible homogeneous MARKOV chain with finite state space. An analogue (14) of Wald's Fundamental Identity, the Operating Characteristic Function (20-21) and the Average Sample Number (22-23) are given. These statements are generalizations of the MARKOV chain as well as some more conditions about the eigenvalues of the transition probability matrix.     

Missing ingredients in political advertising: The right formula for political sophistication and candidate credibility

An increase in usage of political advertising has become a global phenomenon. Previous research on political advertising has found both intended and backlash effects, indicating that the advertising effects are likely to be moderated by message and audience factors. In this study, advertising tones (i.e., positive or negative advertising) are examined. The experimental research also examines two contingent variables—the level of voters’ political sophistication and the degree of candidate credibility. The results indicate that a voter's political sophistication may result in bidirectional effects on the impact of advertising tone. Candidate credibility determines the direction of these effects. When voters face a candidate with high credibility, the influences of negative advertising and comparative advertising decrease but the effects of positive advertising are accentuated as a voter's political sophistication increases. The outcomes are reversed when voters face a candidate with low credibility. The paper concludes by discussing the implications of advertising tactics in election campaigns.     

An Improved Estimation in Regression Parameter Matrix in Multivariate Regression Model

We consider shrinkage and preliminary test estimation strategies for the matrix of regression parameters in multivariate multiple regression model in the presence of a natural linear constraint. We suggest a shrinkage and preliminary test estimation strategies for the parameter matrix. The goal of this article is to critically examine the relative performances of these estimators in the direction of the subspace and candidate subspace restricted type estimators. Our analytical and numerical results show that the proposed shrinkage and preliminary test estimators perform better than the benchmark estimator under candidate subspace and beyond. The methods are also applied on a real data set for illustrative purposes.     

明清回族进士考(四)

本文考证了明清时期安徽、河南所属州县29位进士的生平、事迹及其家世,重点提供了他们为回族的根据,以为进一步深入研究的线索。     

明清回族进士考略(二)

本文考证了明清时期江苏所属州县24位进士的生平、事迹及其家世,重点提供了他们为回族的根据,以为进一步深入研究的线索。     

New approaches to model-free dimension reduction for bivariate regression

Dimension reduction with bivariate responses, especially a mix of a continuous and categorical responses, can be of special interest. One immediate application is to regressions with censoring. In this paper, we propose two novel methods to reduce the dimension of the covariates of a bivariate regression via a model-free approach. Both methods enjoy a simple asymptotic chi-squared distribution for testing the dimension of the regression, and also allow us to test the contributions of the covariates easily without pre-specifying a parametric model. The new methods outperform the current one both in simulations and in analysis of a real data. The well-known PBC data are used to illustrate the application of our method to censored regression.     

Incumbent ideology,district ideology,and candidate entry in U.S. congressional elections, 1954–2008

This paper investigates the role of incumbent ideology on quality candidate entry in U.S. congressional elections. Looking at district ideology, the analysis shows that members of the House and Senate face different ideological incentives in terms of opponent quality. For officials from highly ideological districts, greater ideological extremity is advantageous as it discourages strong opponents. For members from cross pressured districts, however, greater extremity may increase the likelihood of facing a strong opponent. Although the magnitude of these findings vary by party, they illustrate that incumbents face diverging ideological motivations in terms of discouraging strong challengers based on the ideology of their district.     

有限奇异酉几何与PBIB设计(Ⅱ)

用有限奇异酉几何中的1维非迷向子空间作处理构作了多个结合类的对称结合方案和相应的一些PBIB设计,并计算了全部参数.