A Graphical Tool for Interpreting Regression Coefficients of Trinomial Logit Models

Multinomial logit (also termed multi-logit) models permit the analysis of the statistical relation between a categorical response variable and a set of explicative variables (called covariates or regressors). Although multinomial logit is widely used in both the social and economic sciences, the interpretation of regression coefficients may be tricky, as the effect of covariates on the probability distribution of the response variable is nonconstant and difficult to quantify. The ternary plots illustrated in this article aim at facilitating the interpretation of regression coefficients and permit the effect of covariates (either singularly or jointly considered) on the probability distribution of the dependent variable to be quantified. Ternary plots can be drawn both for ordered and for unordered categorical dependent variables, when the number of possible outcomes equals three (trinomial response variable); these plots allow not only to represent the covariate effects over the whole parameter space of the dependent variable but also to compare the covariate effects of any given individual profile. The method is illustrated and discussed through analysis of a dataset concerning the transition of master’s graduates of the University of Trento (Italy) from university to employment.     

The context of employment discrimination: interpreting the findings of a field experiment

Although field experiments have documented the contemporary relevance of discrimination in employment, theories developed to explain the dynamics of differential treatment cannot account for differences across organizational and institutional contexts. In this article, I address this shortcoming by presenting the main empirical findings from a multi‐method research project, in which a field experiment of ethnic discrimination in the Norwegian labour market was complemented with forty‐two in‐depth interviews with employers who were observed in the first stage of the study. While the experimental data support earlier findings in documenting that ethnic discrimination indeed takes place, the qualitative material suggests that theorizing in the field experiment literature have been too concerned with individual and intra‐psychic explanations. Discriminatory outcomes in employment processes seems to be more dependent on contextual factors such as the number of applications received, whether requirements are specified, and the degree to which recruitment procedures are formalized. I argue that different contexts of employment provide different opportunity structures for discrimination, a finding with important theoretical and methodological implications.     

论资本市场全球一体化趋势

资本市场全球一体化是当前全球资本市场发展的基本趋势。是指相对独立的全球各主要资本市场日益融合形成的统一市场网络组织结构体系。表现为市场组织形式的全球网络化 ;筹资主体的国际化 ;投资者的机构化及投资活动的国际化 ;资本流动的全球化 ;同质的金融资产价格趋同化 ;金融机构经营业务的混业化和全球化。资本市场全球一体化降低了市场主体的交易成本 ,提高了市场效率 ;为一些国家调节国际收支失衡与国际储备的保值增值提供了便利条件 ;有利于长期资本的优化配置 ,促进世界经济增长。同时也使各国运用货币政策调控宏观经济的有效性降低 ;市场的系统性风险增大 ;金融监管面临新的挑战     

ERP在钢铁贸易企业的应用研究

以上海宝钢技术经济发展公司为对象,根据公司对提升内部管理及业务流程规范化的要求,研究了公司建立ERP系统的定位及目标,提出应建立以钢材贸易和钢铁产品深加工为主业的ERP体系,实现流通过程中的价值增值.在分析存在的主要问题的基础上,提出了ERP的模式、流程设计及采购业务、库存业务的解决方案.     

无抵触理论与我国公共英语教学

将无抵触理论应用于公共英语教学，可以对外语学习活动进行设计，使学习者水平与任务的难度相当、培养语言学习兴趣、加强师生交流、确保学习者获得学习主动权等，使其在学习过程中体验到巨大乐趣，进入以注意力高度集中和全身心投入为特征的无抵触心理状态，提高学习效率。     

论奉天当局对朝鲜移民开发水田的政策

朝鲜移民的水田开发，促进了东北地区农业经济的发展。开始之初，奉天当局及东北地区官民对开发水田的朝鲜垦民采取了积极鼓励的政策。《满蒙条约》签订之后，为了控制朝鲜移民的迁入和抵制日本帝国主义利用朝鲜移民对中国的侵略，奉天当局对朝鲜移民采取了限制、取缔的政策，严厉禁止朝鲜移民的土地所有权。     

高速SDRAM控制器设计的FPGA实现

同步动态存储器(SDRAM)控制器通常用有限状态机实现,对于一般的设计方法,由于状态数量多,状态转换通常伴随大的组合逻辑而影响运行速度,因此,SDRAM控制器的速度限制了SDRAM存储器的访问速度。该文从结构优化入手来优化方法,利用状态机分解的思想将大型SDRAM控制状态机用若干小的子状态机实现,达到简化逻辑的目的,不仅提高了速度还节省了资源,对该类大型SDRAM控制器的实现有一定参考意义。     

三螺旋创新模式的理论探讨

基于非线性网状创新模型提出的“三螺旋场”和“三螺旋循环”概念进一步推进了三螺旋创新模式的理论研究。三螺旋场概念旨在解释在大学、产业和政府三股螺旋之间存在的相对独立和彼此作用的本质，说明三螺旋的生成原理、静态表现和动态演化特征。三螺旋的生成原理在于创新过程的非线性本质和多主体特征，静态表现为“内核外场模型”，而动态演化过程则在于纵向进化和横向循环。发生在三股螺旋之间的三螺旋循环揭示了在大学、产业和政府之间以人员、信息和产品流动为特征的相互作用和运行机制。     

法与非政治公共领域制度间博弈对社会结构之影响

本文是在《中国社会结构变迁与转型的动因探索:通过社会行动的法与非政治公共领域的关系解读》一文的基础上所做的更进一步的研究,仍以非政治公共领域的主体行动为支点,在非政治公共领域的制度与法律之间搭建桥梁,并通过主体行动实践在这几者要素之间的博弈分析,揭示非政治公共领域主体是如何通过行动实践促使社会结构变迁和转型的,从而进一步探索中国社会结构变迁与转型之潜在动因,并试图对社会行动理论做更深入的诠释和研究。     

实数域及四元数除环上有平方根的方阵

给出了实数域及实四元数除环上方阵有平方根的充分必要条件．