论乡村社会林业的内涵实质与基本特征

本文通过深入分析和研究,界定和归纳了乡村社会林业这一概念,进一步分析了乡村社会林业发展的基本特点和管理要求,揭示了乡村社会林业的内涵实质与基本特征,认为乡村社会林业本身就是适应乡村综合发展的一种可持续林业,乡村社会林业发展能够为山区社会经济发展提供稳定、高质量的生态环境,并促进农村社会的综合协调与持续发展。     

Seasonal labor constraints and intra-household dynamics in the female fields of southern Cameroon

African agricultural production is modeled as a sequential decision process, with men's labor first allotted to clearing, then women's labor allotted to harvesting. A switching regression is then used to measure the constraints due to clearing labor capacity and harvesting labor capacity. The import of men's clearing labor depends on the valuation of shadow wages. Output appears to be more frequently constrained by husband's clearing labor, and in this situation male labor appears under‐utilized. However, output is also significantly constrained by female harvest labor, although the findings imply that female labor is over‐utilized at this stage.     

卫星定位接收机射频模块的研制

简要介绍了我国卫星定位系统的性能和特点,根据接收机的有关技术指标要求,设计并研制了接收机射频电路,文章的最后给出了电路测试和系统调试的结果。     

论美国多轨制对外贸易政策的形成与经济效应

20世纪70年代初,经济实力相对衰弱迫使美国对外贸易政策更加务实,构成了美国实行多轨制对外贸易政策的主要原因。实行多轨制对外贸易政策以来,美国经济结构进一步软化和其他国家的贸易摩擦进一步增加。多轨制对外贸易政策的实质是全面的贸易保护,其目的在于保护本国弱势部门,发展本国强势部门,是一种以绝对优势作为制定对外贸易政策基础的贸易管理方式。     

以培育稀缺要素和嵌入价值链实现“代工模式”转型

在特定的开放战略作用下，中国企业与跨国公司之间形成了相对稳定的“国际代工”关系。这种经济成长模式推动了经济繁荣，也带来一系列问题。但现有文献关注的是发达国家生产组织环节的变化，基本上不关注发展中国家的代工行为。这种情况要求我们必须研究因应策略，推动我国“国际代工模式”的转型。本文提出了通过“培育稀缺生产要素”和“深化全球价值链嵌入”等实现“国际代工模式”升级的不同途径。     

The fragility of a discipline when a model has monopoly status

We consider the consequences of a scientific literature with only one model of an important phenomenon. The falsification of the model would mean falsification of the science. Scientists who would prefer not to have their discipline falsified will be tempted to find ad hoc explanations to excuse the failure. To test this hypothesis we propose a study of the economic forecasts of the comparative Soviet and American growth rates in the years before a public choice model of central planning was a viable alternative to the public interest model. JEL Code A11, B23 Earlier versions of the paper were presented at the University of Manitoba Economics Department Retreat in October 2005 and at the Center for Study of Public Choice Wednesday Seminar in November 2005. We thank the participants for their suggestions. All the remaining errors are our responsibility.     

对中国跨区域水污染治理困境与出路的思考——经济学分析视角

由于忽视各地条件的差异性,采取统一的达标标准,导致各地利益分配不均,产生地方保护主义和消极抵制,使跨区域的水污染治理问题成为当前治污的难点.只有认真地对待各地方利益的差异性,统筹兼顾各方利益,改变治理思路,建立合理的补偿与激励机制,才能使跨区域水污染治理达到预期效果.     

美国实施反倾销贸易政策的动因、绩效与启示

文章通过对美国反倾销贸易保护活动特征的分析,探讨了美国实施反倾销贸易保护政策的动因及其相关影响因素的强度,并对其经济效应进行了分析。反倾销贸易保护措施的实施往往受到利益集团的牵制,对一国整体福利来说并不一定有利。因此,在全球竞争中,为提高贸易效率,各国应建立更加开放的贸易体制。     

Economic Growth and Development: Towards a Catchup Model

We develop a model for economic growth applicable to a group of countries, constituting around half of the gross global production, that have been consistently “catching up” to the US since 1960 or so. This group can be termed “the convergence club.” The model has a theoretical basis developed in other publications (cited), but the present work is essentially empirical. It demonstrates that there is a very strong correlation between “catchup” growth, with respect to the US, and an energy proxy (EP). The energy proxy that works best is a linear combination of domestic electric power consumption petroleum (oil) consumption, per capita, compared to the US levels. The results presented here do not constitute a theory of growth, but they are consistent with theory presented elsewhere. On a practical level, we argue that consistent “catchup” trends over the past 40 years can safely be extrapolated for a few more decades for scenario construction purposes. We also believe that the observed catchup trends can be regarded as “potential” mid-term or long-term growth trajectories for transition economies and others that have recently been adversely affected by conflict or mismanagement.     

新疆对外贸易与经济增长的实证分析

本文根据新疆1990年-2005年的统计数据,利用协整理论和格兰杰(Granger)因果关系检验对新疆国内生产总值、投资和进出口贸易之间的关系进行分析。结果表明新疆国内生产总值与投资及进出口之间存在长期稳定的关系,投资和出口增长是拉动经济增长的原因,而经济增长却不是拉动投资、进出口增长的原因。