Spatial Clustering Tests Based on the Domination Number of a New Random Digraph Family

We use the domination number of a parametrized random digraph family called proportional-edge proximity catch digraphs (PCDs) for testing multivariate spatial point patterns. This digraph family is based on relative positions of data points from various classes. We extend the results on the distribution of the domination number of proportional-edge PCDs, and use the domination number as a statistic for testing segregation and association against complete spatial randomness. We demonstrate that the domination number of the PCD has binomial distribution when size of one class is fixed while the size of the other (whose points constitute the vertices of the digraph) tends to infinity and has asymptotic normality when sizes of both classes tend to infinity. We evaluate the finite sample performance of the test by Monte Carlo simulations and prove the consistency of the test under the alternatives. We find the optimal parameters for testing each of the segregation and association alternatives. Furthermore, the methodology discussed in this article is valid for data in higher dimensions also.     

A New Conjoint Analysis Procedure with Application to Marketing Research

Abstract

In this article we propose some extensions and applications of the nonparametric combination of dependent rankings (see Pesarin, F., Lago, A. (2000). Nonparametric combination of department rankings with applications to the quality assessment of industrial products. Metron LVIII (1–2):39–52.) This methodology is applied to Conjoint Analysis in order to aggregate (ex ante) preferences from a group of individuals. Furthermore, a new global association test (GAT) is introduced in order to test for the association of the global ranking with all attributes of interest. The GAT procedure allows the experimenter to have clear indications on significant attributes by considering the intensity of the optimal weights given by the procedure itself. This may help the experimenter in interpreting the usual analysis involving the normal plot for detecting active effects.     

Estimation of the association for bivariate doubly censored data

We study the problem of estimating the association between two related survival variables when they follow a copula model and the bivariate doubly censored data is available. A two-stage estimation procedure is proposed and the asymptotic properties of the proposed estimator are established. Simulation studies are conducted to investigate the finite sample properties of the proposed estimate.     

关于光复会创建的几个问题--兼与项义华先生商榷

东京的“励志会”“亡国纪念会”“青年会”“军国民教育会”，杭州的“兴浙会”“浙会”“浙学会”和上海的“中国教育会”“爱国学社”等进步团体均是光复会的来源。陶成章与龚宝铨受东京浙学会和军国民教育会的派遣，前往上海创建了光复会。光复会初建时，考虑到应由一个德高望重的人出任会长，于是有着清朝翰林头衔又倡导反清革命的蔡元培被推为首任光复会会长。光复会创建伊始，即将反清作为革命目标。     

安徽省朱子学术研讨会观点综述

介绍安徽朱子研究会2004年学术年会众多专家学者关于朱熹“存天理,灭人欲”思想和“为民”思想、朱熹道德伦理学说的构建、朱熹哲学的世界意义、《四书章句集注》、朱熹研究的方法论等方面的有关观点。     

Discrete–Time Approximations of the Holmström–Milgrom Brownian–Motion Model of Intertemporal Incentive Provision

This paper studies the relation between discrete–time and continuous–time principal–agent models. We derive the continuous–time model as a limit of discrete–time models with ever shorter periods and show that optimal incentive schemes in the discrete–time models approximate the optimal incentive scheme in the continuous model, which is linear in accounts. Under the additional assumption that the principal observes only cumulative total profits at the end and the agent can destroy profits unnoticed, an incentive scheme that is linear in total profits is shown to be approximately optimal in the discrete–time model when the length of the period is small.     

Bias corrected MLEs under progressive type-II censoring scheme

ABSTRACT

Censoring frequently occurs in survival analysis but naturally observed lifetimes are not of a large size. Thus, inferences based on the popular maximum likelihood (ML) estimation which often give biased estimates should be corrected in the sense of bias. Here, we investigate the biases of ML estimates under the progressive type-II censoring scheme (pIIcs). We use a method proposed in Efron and Johnstone [Fisher's information in terms of the hazard rate. Technical Report No. 264, January 1987, Stanford University, Stanford, California; 1987] to derive general expressions for bias corrected ML estimates under the pIIcs. This requires derivation of the Fisher information matrix under the pIIcs. As an application, exact expressions are given for bias corrected ML estimates of the Weibull distribution under the pIIcs. The performance of the bias corrected ML estimates and ML estimates are compared by simulations and a real data application.     

公平偏好员工的锦标激励研究

传统锦标理论建立在员工是纯粹自利的假设上,而行为合约理论认为员工是具有公平偏好的.本文分析在完全竞争和不完全竞争的劳动力市场和产品市场中,针对具有公平偏好的员工的最优锦标机制设计及产出效率问题.以期为企业劳动舍约的设计提供一种更加接近现实的、可供借鉴的思路.     

“中国画会”史事钩沉

中国画会是20世纪三四十年代活跃于国内画坛的一支重要力量,其规模之大,活动时间之久、组织机构之完善堪称一时之最。画会成立之后,以其明确的理念诉求,开展览、编刊物、办讲座,以及赈灾济困、书画救亡,积极而又高效地开展了一系列的艺术与社会活动,为继承传统、发扬国光和社会公益事业作出了重要贡献。     

论我国体育行业协会权能的自治和法律规制

市场经济条件下,体育行业协会在我国体育的发展中充当着协调政府与社会对体育管理的角色。体育行业协会具有服务、管理、监督处罚等权能,其权能具有重要的自治和法治价值。因此有必要在探讨体育行业协会的社会角色和本质属性的基础上,对其权能的自治和法律规制进行研究。