山东发达地区农业生产结构的演进

本文在对山东发达地区农业生产结构演进轨迹研究的基础上,依据产业结构基本原理,剖析了农业生产结构演进中存在的问题及其原因,提出了促进农业生产结构合理演进的对策。     

饲草生产学教学方法的探讨

《饲草生产学》是草业科学专业重要的选修课程。在饲草生产学教学过程中,通过构建新的课程教学体系,加强课程条件建设,改进课程教学方法和教学手段,注重实践教学环节和学生能力的培养,调动学生学习的积极性,提高了教学质量。     

Hyperbolic Efficiency and Parametric Distance Functions: With Application to Spanish Savings Banks

Distance functions are gaining relevance as alternative representations of production technologies, with growing numbers of empirical applications being made in the productivity and efficiency field. Distance functions were initially defined on the input or output production possibility sets by Shephard (1953, 1970) and extended to a graph representation of the technology by Färe, Grosskopf and Lovell (1985) through their graph hyperbolic distance function. Since then, different techniques such as non parametric-DEA and parametric-SFA have been used to calculate these distance functions. However, in the latter case we know of no study in which the restriction to input or output orientation has been relaxed. What we propose is to overcome such restrictiveness on dimensionality by defining and estimating a parametric hyperbolic distance function which simultaneously allows for the maximum equiproportionate expansion of outputs and reduction of inputs. In particular, we introduce a translog hyperbolic specification that complies with the conventional properties that the hyperbolic distance function satisfies. Finally, to illustrate its applicability in efficiency analysis we implement it using a data set of Spanish savings banks.     

生产力、生产关系矛盾运动规律新探

生产力、生产关系辩证运动规律是人类社会发展变化的基本规律。长期以来,由于对这一基本规律认识的简单化和绝对化,造成了认识上的混乱。首先,生产力不是“物质力量”,而是人与自然的矛盾关系的统一;其次,生产力的存在方式是客观现实性和社会历史性的统一,与之对应,生产关系也是如此;再次,生产力、生产关系的矛盾运动规律不是“有什么样的生产力,就有什么样的生产关系”,而是生产力的质变必然导致生产关系的质变,生产力的量变也可能导致生产关系的质变,一种性质生产力的存在,可以决定不同性质生产关系同时并存。     

浅析中央空调系统安装过程中应注意的问题

中央空调系统一般是由以下四部分构成:空调通风系统、冷(热)水系统、蒸汽系统、凝结水系统。本文阐述了其安装过程中应注意的一些问题。     

我国收入差距扩大的影响因素及其实证分析——以行业收入变动为视角

笔者以传统行业收入决定理论为基础,运用2003年～2008年我国19个行业的面板数据构建模型,系统地分析了2002年至今各行业收入变动的影响因素及其影响效果.结果表明,生产效率仍然是决定收入变动的重要因素;垄断因素在行业收入差距扩大中扮演最重要的角色;人力资本水平对收入变动的作用有待于进一步提升.笔者还阐述了加入"世贸"组织后垄断行业暴利、高教扩招等社会现实问题对行业收入变动的影响.     

Fits,misfits and interactions: learning at work,job satisfaction and job‐related well‐being

The resource‐based view (RBV) of the firm has focused attention on the importance of aligning employees' needs with the requirements of the jobs they do. This article focuses on how these needs and requirements interact in terms of learning. It does so in two ways. First, it develops new survey instruments to capture the learning demands of jobs and the learning dispositions of workers and uses them for the first time in a survey of 2,810 employees. Second, it examines how these person and job characteristics correlate with specific aspects of job satisfaction and job‐related well‐being. The results show that although learning alignment is associated with high levels of satisfaction and well‐being, not all learning misalignments are associated with the reverse.     

基于Logistic模型的东北地区粮食生产能力影响因素研究——以宾县为例

[目的]粮食生产能力关系到粮食供给和国家粮食安全,如何提高粮食生产能力是我国亟待解决的问题。文章以宾县为例,通过一定的方法探索粮食生产能力的影响机制,最终提出提高粮食生产能力的合理建议。[方法]利用农户调查数据,借助Logistic模型探讨自然因素和社会经济因素对粮食生产能力的影响特点。[结果](1)品种技术推广、作物收益对粮食生产能力的影响效应在1%水平上达到显著;(2)生育期变化、土地质量、旱灾、耕作方式对粮食生产能力的影响效应在5%水平上达到显著;(3)温度、降水、冷害及农业生产资料投入对粮食生产能力的影响效应在10%水平上达到显著;(4)温度与降水是否集中在生育期内、出售情况、农业引导政策对粮食生产能力的影响不显著。[结论]针对研究结果,该文提出,可从预防低温冷害、健全水利设施、完善耕地保护制度及加强农业基础设施建设等方面提高粮食生产能力。     

On discrimination in the optimal management of teams

We study the optimal management of teams in which agents’ effort decisions are mapped (via a production technology) into the probability of the team’s success. Optimal wage schemes in such context are largely discriminatory, but we show that the extent of the discrimination crucially depends on the existence of moral hazard. More precisely, for teams with a flat structure, the domain of production technologies giving rise to discrimination is broader when agents’ actions are observable and contractible. For teams with a sequential structure, the result reverses and the domain of production technologies giving rise to discrimination is broader when there exists moral hazard. Finally, in more cooperative environments in which agents are allowed to collude, optimality does not entail discrimination, with or without moral hazard.