Concentration behavior of the penalized least squares estimator

Consider the standard nonparametric regression model and take as estimator the penalized least squares function. In this article, we study the trade‐off between closeness to the true function and complexity penalization of the estimator, where complexity is described by a seminorm on a class of functions. First, we present an exponential concentration inequality revealing the concentration behavior of the trade‐off of the penalized least squares estimator around a nonrandom quantity, where such quantity depends on the problem under consideration. Then, under some conditions and for the proper choice of the tuning parameter, we obtain bounds for this nonrandom quantity. We illustrate our results with some examples that include the smoothing splines estimator.     

乡镇企业发展的困境与思路——赤湖镇乡镇企业发展情况调查

乡镇企业自产生以来就为解决农村富余劳动力,促进农村经济的发展与稳定,及国民经济持续、稳定、快速地发展作出了重大的贡献。但是,随着国民经济进一步向纵深方向发展,乡镇企业自身的缺陷日益显露出来,加之国内外竞争环境发生了深刻变化。这势必影响乡镇企业潜力的充分发挥与健康发展。如何挖掘发展潜力正是当务之急。本文旨在剖析制约乡镇企业发展的深层次因素,借鉴成功范例的经验,谋求其的新发展。     

人才强国,关键在于培养和使用好人才

我国是一个人口大国，如何将我国的人口负担转化为人才资源优势，这是党和国家建设事业的关键问题。笔者认为人才强国战略的实施，关键在于培养和使用好人才，在于快出人才，多出人才和出好人才。为此，文章提出了一些人才使用的策略。     

Probability theory in fuzzy sample spaces

This paper tries to develop a neat and comprehensive probability theory for sample spaces where the events are fuzzy subsets of The investigations are focussed on the discussion how to equip those sample spaces with suitable -algebras and metrics. In the end we can point out a unified concept of random elements in the sample spaces under consideration which is linked with compatible metrics to express random errors. The result is supported by presenting a strong law of large numbers, a central limit theorem and a Glivenko-Cantelli theorem for these kinds of random elements, formulated simultaneously w.r.t. the selected metrics. As a by-product the line of reasoning, which is followed within the paper, enables us to generalize as well as to bring together already known results and concepts from literature.Acknowledgement. The author would like to thank the participants of the 23rd Linz Seminar on Fuzzy Set Theory for the intensive discussion of the paper. Especially he is indebted to Professors Diamond and Höhle whose remarks have helped to get deeper insights into the subject. Additionally, the author is grateful to one anonymous referee for careful reading and valuable proposals which have led to an improvement of the first draft.This paper was presented at the 23rd Linz Seminar on Fuzzy Set Theory, Linz, Austria, February 5–9, 2002.     

The Nonparametric Approach to Applied Welfare Analysis

Changes in total surplus are traditional measures of economic welfare. We propose necessary and sufficient conditions for rationalizing individual and aggregate consumer demand data with individual quasilinear and homothetic utility functions. Under these conditions, consumer surplus is a valid measure of consumer welfare. For nonmarketed goods, we propose necessary and sufficient conditions on input market data for efficient production, i.e. production at minimum cost. Under these conditions we derive a cost function for the nonmarketed good, where producer surplus is the area above the marginal cost curve. We are greatful to helpful remarks and comments of the referees and the editor. The work is partially supported by the Spanish Ministry of Science and Technology, through Grant BEC2002-2130, the Generalitat de Catlaunya, through Grant 2005SGR-00454 and the Barcelona Economics Program (CREA).     

河北省金融业发展之对策分析

目前河北省金融业发展水平较低，要建设沿海经济社会发展强省，河北省必须首先成为一个金融强省。河北省金融业定位于围绕京津两个金融中心的区域性产业金融，即立足河北省区域，服务于“三农”、京津冀梯度转移产业、港口产业和海洋产业。应制定金融产业发展规划，采取优化金融生态环境，调整金融产业结构，整合金融资源，开放金融市场等措施来推动金融产业的发展。     

基于强互惠理论的会计准则变迁研究

强互惠理论将人类的精神活动因素引入制度变迁研究中,扩展了人们将制度作为外部环境的接受者,制度变迁是自发演化过程或理性设计过程简单＂二分法＂的认识。会计准则作为一种制度安排,能够运用制度的理论框架予以分析。本文在强互惠理论博弈解说的基础上,对1992~2006年中国会计准则变迁过程进行分析。研究结论显示：中国会计准则变迁是自发演化与理性设计的统一,中国会计准则变迁过程中体现出自愿性和强制性双重强互惠特征,而且自愿性强互惠是主要特征,政府型强互惠滞后。     

Mapping themes in the study of new work practices

Both shaping and shaped by technological, economic and social facets, the world of work has witnessed a wide array of changes. This review article sets out to provide a synthesis of some of the main directions and insights of existing research connected to the new world of work. In particular, we approached the topic of new work practices through four key dimensions: (1) Conceptual and methodological dimensions in the study of new work practices; (2) Spatial and temporal manifestations of new work practices in the collaborative economy; (3) Individuals, organizations and new work configurations; (4) Power and control. The review article critically discusses the future of work and argues that the ‘new’ world of work simply repeats asymmetrical power relations and inequalities that characterise work activities, with the potential of exacerbating even further disparities, inequalities and precarity.     

A prospective analysis of labour market status and self-rated health in the UK and Russia

Comparing prospective data from the UK and Russia, this paper analyzes whether the association of labour market status, and particularly unemployment, with subsequent health varies by the level of state protection provided to the unemployed. While the UK's unemployment welfare regime is classified as providing minimal protection, the Russian regime is sub-protective. Employing Cox duration analysis upon data from the Russian Longitudinal Monitoring Survey and the British Household Panel Survey for the period 2000–2007, this study finds that labour market status and economic circumstances independently predicted individual-level declines in self-rated health and, contrary to expectations, the associations of unemployment with health decline were similarly sized in the two countries.     

Socio-spatial inequalities and urban transformation. The case of Rome districts

Over the past thirty years, public policy in Rome has failed to effectively address a rising level of socio-economic inequality. Indicators such as level of education or number of household members appear to be geographically concentrated and sensitive to the distance from the city centre. The hypothesis that socio-spatial inequalities strongly influence economic performance and foster political instability has been subject to numerous empirical investigations. Nevertheless, studies of specific urban contexts are not common. The absence of empirical applications at this scale is probably due to the fact that variables used for analysing the economic and social performance of regions are difficult to quantify or inapplicable at the micro level. The purpose of this paper is to examine the spatial distribution of socioeconomic inequalities in the municipal territory of Rome and to explore the conditions that account for them. We will analyse the spatial distribution of urban quality indicators and socio-economic profiles with data from different sources, aggregated at the neighbourhood level.