Efficient learning via simulation: A marginalized resample-move approach

In state–space models, parameter learning is practically difficult and is still an open issue. This paper proposes an efficient simulation-based parameter learning method. First, the approach breaks up the interdependence of the hidden states and the static parameters by marginalizing out the states using a particle filter. Second, it applies a Bayesian resample-move approach to this marginalized system. The methodology is generic and needs little design effort. Different from batch estimation methods, it provides posterior quantities necessary for full sequential inference and recursive model monitoring. The algorithm is implemented both on simulated data in a linear Gaussian model for illustration and comparison and on real data in a Lévy jump stochastic volatility model and a structural credit risk model.     

An exploratory review of the relationship between enterprise training and technology upgrading: evidence from South African manufacturing firms

The study examines the extent to which disaggregated training variables are related to technological upgrading, in the context of a middle-income developing country trying to manage its integration into the global economy. For a developing country, successful integration into the global economy requires that local manufacturing firms are able to competitively restructure, as a precondition for survival and long-term growth. Consequently, skills and technological upgrading are crucial in raising the international competitive advantage of local firms. Enterprise-provided training is one means that can be used by local firms to continuously upgrade their knowledge bases, increase their international competitiveness, and enhance employment growth over time. This paper uses South Africa as a case study, to demonstrate how economic reform measures can expose skills deficiencies in the manufacturing sector and lead to an increase in capital intensity of the sector. Exposure of skills deficiencies, in turn, raises the importance of skill-upgrading through schooling and training of existing workforce. Despite a couple of studies on the evolution of the labour market in South Africa, no previous research has explicitly examined the relationship between technological upgrading and disaggregated training/learning variables at the firm level. This paper aims to fill that gap by focusing on disaggregated enterprise-based training efforts. The study uses the Human Capital theoretical framework to answer the main research question: Which disaggregated learning variables (i.e., on-the-job or off-the-job training offered to different occupational groups) are significantly associated with technological upgrading? The study raises possible issues of heterogeneity in returns to training offered to different occupational groups in the context of technological-upgrading. On the other hand, technological upgrading may not necessarily always disadvantage all unskilled workers. Possible policy implications of research findings are outlined.     

Role and impact of the environment on entrepreneurial learning

Abstract

This article is presenting an overview of the literature devoted to entrepreneurial learning and, more specifically, those research bringing environmental elements into the study of the entrepreneurial learning process. Then, it shows how each of the four Special Issue selected research papers contribute to enhancing our knowledge of the complexity of the learning process vis-à-vis entrepreneurial processes placed in context. By doing this, it makes an attempt to explain the specific context behind each contribution as well as presenting the wider context. Finally, the article is suggesting a set of key challenges and research pathways that might be explored in the future.     

技术中介市场作用机制及其声誉的模型探讨

随着我国技术市场的不断完善和发展,技术中介的作用日益凸现。本文从技术中介的重要作用出发,探讨了客户在选择技术中介时中介机构声誉的重要性、影响技术中介声誉的因素以及技术中介与客户相互作用的机制。     

终身学习视角下公共图书馆的转型与发展思考

公共图书馆作为公共文化服务体系的重要组成部分,在构建学习型社会的大背景下,为促进终身学习的理念,借鉴国外图书馆的前沿探索,提升人文素质和知识内涵,实现公共图书馆在新的历史形势下自身的转型与发展。     

社会工作在基层治理专业化中的角色与功能

近年来,我国对居民社区建设的重视度不断提升,社区公共服务团队也在不断壮大,在国家政策的实施以及广大社区管理中,社区管理机构发挥着十分关键的作用。随着城乡居民生活水平的不断提升,传统的管理模式与基层治理手段已经落后,难以满足社区发展与民众生活的多元化以及专业化需求,因此,在社区治理中,融入专业性社会工作已经成为大势所趋。论文结合社会工作参与乡村振兴建设战略所进行的一系列工作,探究社会工作在基层治理专业化道路上扮演的角色,指出社会工作在基层治理专业化中的功能,阐明当前社区治理中的问题,探索促进基层社区治理可持续发展的道路。     

Three Corrected Score Tests for Generalized Linear Models with Dispersion Covariates

We develop three corrected score tests for generalized linear models with dispersion covariates, thus generalizing the results of Cordeiro , Ferrari and Paula (1993) and Cribari-Neto and Ferrari (1995) . We present, in matrix notation, general formulae for the coefficients which define the corrected statistics. The formulae only require simple operations on matrices and can be used to obtain analytically closed-form corrections for score test statistics in a variety of special generalized linear models with dispersion covariates. They also have advantages for numerical purposes since our formulae are readily computable using a language supporting numerical linear algebra. Two examples, namely, iid sampling without covariates on the mean or dispersion parameter oand one-way classification models, are given. We also present some simulations where the three corrected tests perform better than the usual score test, the likelihood ratio test and its Bartlett corrected version. Finally, we present a numerical example for a data set discussed by Simonoff and Tsai (1994) .     

工会在建设和谐设计院中的定位、作用和工作方法

胡锦涛总书记在省部级主要领导干部提高构建社会主义和谐社会能力专题研讨班上的重要讲话中指出,我们所要建设的社会主义和谐社会,应该是民主法治、公平正义、诚信友爱、充满活力、安定有序、人与自然和谐相处的社会。和谐设计院是社会主义和谐社会大系统中的一个有机组成部分,同样应该是具备民主法治、公平正义、诚信友爱、充满活力、安定有序、人与自然和谐相处6个要素的设计院。文章根据和谐社会的特征,结合某设计院实际,详细解读了和谐设计院的标准,并分析了在创建和谐设计院中工会的工作定位与作用。     

基于工作过程的高职院校《平面设计》课程学习情境设计探讨

文章以对基于工作过程的《平面设计》课程学习情境进行分析,论述了《平面设计》课程学习情境设计的重要性及具体的学习情境设计,并提出了实施建议和今后任务,充分展现教学过程的实践性、开放性和职业性,努力实现理论和实践的有机结合。