怎样的制造企业更愿涉足服务业务?———“服务化困境”问题的生产率匹配探析

本文关注于制造业企业服务化过程中的产业效率因素,设计了差异化产品模型。在需求层面,公司所提供的产品和服务之间具有互补性;而在供应方面,企业在产品生产和服务之间在专业知识分配上存在竞争。理论模型提供了对制造企业服务化与全要素生产率之间的计量评估。本文利用我国上市制造业版块中的企业数据,通过使用具有异质性的Fractional Probit 模型控制内生性并进行实证检验,理论模型推导和经验估计指出,企业全要素生产率与服务化之间存在“U”型关系,针对四个行业部门的检验也证实服务化和企业全要素生产率之间的非线性关系。在不同地区的企业之间,“U”型关系也存在差异。企业所处行业环境、所在区域以及所提供产品和服务的内在特征对于“服务化困境”的表现都存在差异性的影响。     

认真评价本犯的事后行为

"不可罚的事后行为"给人当然不可罚的印象,因而"共罚的事后行为"的概念更为准确;在本犯行为因为具有违法性阻却事由、责任阻却事由、超过追诉时效以及在诉讼法上不能证明时,能够而且必须对事后行为单独进行评价;未满十六周岁的人盗窃财物或捡拾遗忘物,满十六周岁后故意加以毁坏的,构成故意毁坏财物罪;本犯教唆他人作伪证的,可能构成妨害作证罪;杀人后碎尸的,将侮辱尸体罪与故意杀人罪数罪并罚,有助于减少故意杀人罪死刑的不当适用;间歇性精神病人伤害他人,恢复正常后不救助而导致他人死亡的,构成不作为的故意杀人罪.     

Tests for assessment of agreement using probability criteria

For the assessment of agreement using probability criteria, we obtain an exact test, and for sample sizes exceeding 30, we give a bootstrap-t$t$ test that is remarkably accurate. We show that for assessing agreement, the total deviation index approach of Lin [2000. Total deviation index for measuring individual agreement with applications in laboratory performance and bioequivalence. Statist. Med. 19, 255–270] is not consistent and may not preserve its asymptotic nominal level, and that the coverage probability approach of Lin et al. [2002. Statistical methods in assessing agreement: models, issues and tools. J. Amer. Statist. Assoc. 97, 257–270] is overly conservative for moderate sample sizes. We also show that the nearly unbiased test of Wang and Hwang [2001. A nearly unbiased test for individual bioequivalence problems using probability criteria. J. Statist. Plann. Inference 99, 41–58] may be liberal for large sample sizes, and suggest a minor modification that gives numerically equivalent approximation to the exact test for sample sizes 30 or less. We present a simple and accurate sample size formula for planning studies on assessing agreement, and illustrate our methodology with a real data set from the literature.     

张掖市虚拟水投入产出分析

 虚拟水战略是水资源社会化管理的一个重要途径。本文应用地区水资源投入产出模型,剔出外地调入品影响,通过本地完全需水系数,以及完全需水量与直接用水量比较,计算了张掖市产业间虚拟水的净转移以及区域虚拟水的调入调出,进一步构造了产业间虚拟水转移矩阵,清晰量化各产业间虚拟水的转移去向。结果表明,种植业及其他农业是虚拟水最大的净转移和输出部门,利用的水实际向制造业和畜牧业大量转移, 畜牧业又将种植业转移来的水大部分输出外地。通过量化经济部门之间对水资源需求的数量关联效应,从投入产出分析视角为张掖市水需求管理提供新的参考。     

Bootstrapping Malmquist Indices for Danish Seiners in the North Sea and Skagerrak

In connection with assessing how an ongoing development in fisheries management may change fishing activity, evaluation of Total Factor Productivity (TFP) change over a period, including efficiency, scale and technology changes, is an important tool. The Malmquist index, based on distance functions evaluated with Data Envelopment Analysis (DEA), is often employed to estimate TFP changes. DEA is generally gaining attention for evaluating efficiency and capacity in fisheries. One main criticism of DEA is that it does not have any statistical foundation, i.e. that it is not possible to make inference about DEA scores or related parameters. The bootstrap method for estimating confidence intervals of deterministic parameters can however be applied to estimate confidence intervals for DEA scores. This method is applied in the present paper for assessing TFP changes between 1987 and 1999 for the fleet of Danish seiners operating in the North Sea and the Skagerrak.     

在精益生产和全面质量管理视角下重新审视清洁生产

清洁生产的概念正风行全球,而作为企业管理两大先进方式的精益生产和全面质量管理早已在 中国的不少企业中实施开来。本文从介绍清洁生产的背景出发,结合清洁生产的核心理念以及精益生产和全 面质量管理理论的精髓,讨论了清洁生产与精益生产和全面质量管理之间的相互关系,并指出清洁生产是精 益生产和全面质量管理理念在21世纪的可持续发展形式和载体。     

To shame or not to shame—that is the sanitation question

The Community‐Led Total Sanitation (CLTS) programme aims to end open defecation through facilitating activities that evoke a sense of shame, shock and disgust. The programme's initial success and low‐cost design has seen it become hegemonic in donor‐supported rural sanitation. However, the theoretical basis of the use of shame has not been critically evaluated. Supporters claim that shame helps form and maintain social relationships, yet contemporary psychosocial literature highlights that it is a volatile and often harmful emotion, particularly in conditions of poverty. Using a case study of Cambodia, which rejected the coercive elements of shame in CLTS, we explore the problems of shame and limits of local ownership of development.     

A GEOMETRIC CHARACTERIZATION OF LINEAR REGRESSION

This paper concerns the asymptotic properties of the maximum likelihood estimators of the parameters in a non regular Cox model involving a change-point in the regression on time-dependent covariates. The global consistency derives from the uniform convergence of the partial log-likelihood. We prove that the estimator of the change-point is n -consistent and the estimator of the regression parameter n 1/2 -consistent, and their asymptotic distributions are established.     

Learning to learn and productivity growth: Evidence from a new car-assembly plant

This paper models learning by experience beyond the experience curve, including the possibility of “learning to learn”: the pace of learning increases over time by building on what has already been learned. We compare the extended deterministic learning model with Jovanovic and Nyarkos' [26] stochastic learning. The theoretical models are tested with data on the total factor productivity of a car-assembly plant in its first months of operation. We find that the deterministic “mixed learning model”, where the speed of learning is equal to a constant plus a learning to learn effect, is the one that best fits the empirical data. The mixed learning model results in a time pattern of total factor productivity growth, first increasing and later decreasing, different from the always decreasing rate of growth of the learning curve, opening new perspectives on the study of learning by experience.     

SMALL AND PSEUDO-SMALL SETS FOR MARKOV CHAINS

In this paper we examine the relationship between small sets and their generalisation, pseudo-small sets. We consider conditions which imply the equivalence of the two notions, and give examples where they are definitely different. We give further examples where sets are both pseudo-small and small, but the minorisation constants implied by the two notions are different. Applications of recent computable bounds results are given and extended. We also give a result linking the ideas of monotonicity and minorisation. Specifically we demonstrate that if a non-monotone chain satisfies a minorisation condition, and furthermore is stochastically dominated by a monotone chain which satisfies a Lyapunov drift condition, then a probability construction exists which incorporates both the bounding process and the minorisation condition.