Robust confidence interval for a residual standard deviation

The residual standard deviation of a general linear model provides information about predictive accuracy that is not revealed by the multiple correlation or regression coefficients. The classic confidence interval for a residual standard deviation is hypersensitive to minor violations of the normality assumption and its robustness does not improve with increasing sample size. An approximate confidence interval for the residual standard deviation is proposed and shown to be robust to moderate violations of the normality assumption with robustness to extreme non-normality that improves with increasing sample size.     

关于再就业的现状与对策的一些思考——芷江西路街道个案研究

笔者在芷江西路街道实践活动的主要任务是完成“再就业的现状及对策”这一课题的材料收集工作。材料的收集过程比想象的要困难、复杂得多。一开始,由于居委会关于失业、下岗人员的记录不全面,笔者只得到街道劳动科查找有关资料并按性别、姓名、年龄、文化程度、原单位、再就业单位、失业原因制     

论品德心理规律在大学生道德教育中的途径

品德是道德在个体身上的表现。全面贯彻落实《公民道德建设实施纲要》,应十分重视对品德心理规律的研究。本文通过分析大学生品德心理特点 ,探讨运用了品德心理规律 ,加强大学生道德教育工作的途径和方法。     

论我国企业股票期权激励制度的推进与改进

近年来 ,股票期权已经成为中国经济界和企业界共同探讨的一个热门话题。十几年来美国等西方国家在此方面的成功实践充分证明了股票期权在激励企业经营者、减少代理成本、改善治理结构、促进稳健经营等方面的巨大优越性。但是 ,作为一种全新的激励分配制度 ,由于理论上的匮乏及实践上的欠缺 ,对我国广大企业而言 ,股票期权还是一个新生事物 ,还极不成熟与规范 ,在现行制度及技术上还存在着很多障碍 ,并未能发挥出其应有的作用。本文将对处于摸索中的该制度的实施与完善从理论及实践上作相关探讨     

Goal Ambiguity and Organizational Performance in U.S. Federal Agencies

In spite of numerous observations that government organizationshave high levels of organizational goal ambiguity that exertmajor influences on their other characteristics, few researchershave measured goal ambiguity and tested these frequent assertions.In previous research, we developed measures of four dimensionsof goal ambiguity: mission comprehension ambiguity, directivegoal ambiguity, evaluative goal ambiguity, and priority goalambiguity. Confirming hypotheses developed from the literatureon public organizations, the latter three variables showed relationsto such organizational characteristics as organizational age,financial publicness (proportion of funding from governmentallocations), and regulatory status. This article reports asecond analytical step of examining the relations between thegoal ambiguity dimensions and indicators of organizational performancebased on responses to the 2000 National Partnership for ReinventingGovernment Survey of federal employees. The performance variablesincluded managerial effectiveness, customer service orientation,productivity, and work quality. Regression analyses with numerouscontrol variables found that directive, evaluative, and prioritygoal ambiguity related negatively to managerial effectiveness.All four performance indicators showed significant negativerelationships with evaluative goal ambiguity and directive goalambiguity. The results provide further evidence of the viabilityof the new measures of goal ambiguity, support theory-basedbut previously untested hypotheses, and further indicate thefeasibility and value of analyzing goal ambiguity of governmentorganizations.     

A LOTTO SYSTEMS PROBLEM

A Lotto Systems bet allows the player to nominate n numbers from which (s)he believes the winning six numbers will be drawn, and to bet on all combinations of six of these n numbers. Assume that the winning six numbers come from the nominated n. How many combinations must be entered to guarantee that one combination will include at least five of the winning six numbers? The problem is generalized in this paper, and the method of simulated annealing is used to find solutions for various situations. The case where two supplementary numbers are drawn after the initial six winning numbers is also considered.     

Drug testing laws and employment injuries

Employer use of employee drugscreening procedures is widespread in the U.S. A state-by-state analysis of statutory law applicable to the drug testing issue is combined with state and industry data to isolate how drug testing laws affect workplace injury rates. Based on our data, injury rates are not statistically related to the state’s legal environment.