生态安全对城市生态系统的影响

生态安全是实现城市可持续发展的必要保障。本文通过对水资源安全、环境安全、物种安全、生物入侵这四个当前主要城市生态安全问题进行讨论,分析了它们对城市生态系统服务功能的影响,并相应提出了解决对策。     

整合与超越:新全球化时代经济学范式探微

世界正发生着从"旧全球化时代"向"新全球化时代"的重大转变.伴随这一时代转折,建立在传统工业文明基础上的经济学正面临着研究范式的挑战,因为它已经不能适应以高科技为先导,以科技成果的商品化、产业化、国际化为特征的新时代所遇到的各种复杂问题.其研究范式急需进行整合与超越,交往实践观为其提供了新的视域和新的理论范式.     

Land conservation and tenure security in Kenya: Boserup's hypothesis revisited

Land conservation technologies used by farmers are known to play an important role in improving farm incomes and household welfare in the long run. For this reason substantial investments have been made in research to improve agricultural technologies in various parts of the world, from the development of new crop varieties to new practices of land management. This paper explores the impact of land rights among other factors on adoption of soil and water conservation practices. The study further tests for Boserup's hypothesis (correlation between population density, land conservation and property rights) using panel survey data collected from farming households. The key findings of the paper are that property right regimes and population density affect both the decision to conserve land as well as the type of conservation practices used by farmers. The results further suggest a positive correlation between land tenure security and population density, thus supporting Boserup's hypothesis. The findings call for pursuit of both short-term and long-term policy measures that offer incentives for land conservation through government initiatives and participation of local communities.     

关于我国财政政策导向调整的研究

近年来我国实施的积极财政政策确实在很大程度上促进了经济和社会的发展。但是随着经济市场化程度的不断提高和经济环境的变化，这种积极财政政策也表现出诸多的不适应性。因此应适时调整财政政策导向以适应经济和社会发展的新要求。拟从我国近年来实施的积极财政政策的成效分析出发，阐述了当前调整财政政策导向的必然性，并提出了今后我国财政政策的调整方向。     

管理会计信息披露及其市场识别——来自中国沪深股市的经验证据

财务会计通常被理解为对外报告会计。因管理会计服务于公司内部的管理决策,与公司价值具有内在关联性,因而管理会计信息的对外披露与市场识别此类信息之间具有理论上的逻辑一致性。文章以管理会计信息的整体披露水平能否被市场有效识别为研究命题,对沪深股市年度报告中管理会计信息披露的市场识别程度及其规律进行了实证研究。结果表明:管理会计信息披露能够被市场投资者识别并使用,但此类信息的披露需要市场耗费一定的时间予以吸收;同时,与财务会计信息披露相比,管理会计信息披露水平提高同等程度,更容易被市场识别。     

Biological Adaptation in Human Societies: a ‘Basic Needs’ Approach

The groundzero premise (so to speak) of the biological sciences is that survival and reproduction is the basic, continuing, inescapable problem for all living organisms; life is at bottom a survival enterprise. It follows that survival is the paradigmatic problem for human societies as well; it is a prerequisite for any other, more exalted objectives. Although the term adaptation is also familiar to social scientists, until recently it has been used only selectively, and often very imprecisely. Here a more rigorous and systematic approach to the concept of adaptation is proposed in terms of basic needs. The concept of basic human needs has a venerable history – tracing back at least to Plato and Aristotle. Yet the development of a formal theory of basic needs has lagged far behind. The reason is that the concept of objective, measurable needs is inconsistent with the theoretical assumptions that have dominated economic and social theory for most of this century, namely, valuerelativism and cultural determinism. Nevertheless, there have been a number of efforts over the past 30 years to develop more universalistic criteria for basic needs, both for use in monitoring social wellbeing (social indicators) and for public policy formulation. Here I will advance a strictly biological approach to perationalizing the concept of basic needs. It is argued that much of our economic and social life (and the motivations behind our revealed preferences and subjective utility assessments), not to mention the actions of modern governments, are either directly or indirectly related to the meeting of our basic survival needs. Furthermore, these needs can be specified to a first approximation and supported empirically to varying degrees, with the obvious caveat that there are major individual and contextual variations in their application. Equally important, complex human societies generate an array of instrumental needs which, as the term implies, serve as intermediaries between our primary needs and the specific economic, cultural and political contexts within which these needs must be satisfied. An explicit framework of Survival Indicators, including a profile of Personal Fitness and an aggregate index of Population Fitness, is briefly elucidated. Finally, it is suggested that a basic needs paradigm could provide an analytical tool (a biologic) for examining more closely the relationship between our social, economic and political behaviors and institutions and their survival consequences, as well as providing a predictive tool of some value.     

Definitions and progress of ecosystem health and ecological security

1. Introduction Development of human industrial civilization and predatory exploitation of natural resources have in- duced tremendous changes of ecological environment. In recent years, territorial and global environmental problems have increased, such as greenhouse effect, depletion of ozone, global warming, water scarcity, water pollution, acid rain, decrease of biodiversity, soil erosion desertification etc. These changes seriously intimidate the health and security of ecosystems, and dist…     

The Economics and Bioeconomics of Folk and Scientific Classification

Synopsis This paper is the product of a collaboration between a biologist (Ghiselin 1997) who works on the philosophy of classification and an economist (Landa 1981, 1994) who works on the ‘Economics of Identity’: how and why people classify people based on identity in the context of a theory of ethnic trading networks. In developing the ‘bioeconomics’ (the synthesis of economics with biology) of classification, we crossed a number of disciplinary boundaries—anthropology, economics, sociology, biology, and cognitive psychology including evolutionary psychology’s ‘fast and frugal’ heuristics. Using a bioeconomics approach, we argue that folk classifications—the classifications used by ordinary persons—have much in common with scientific classifications: underlying both is the need for economy of information processing in the brain, for the efficient organization of knowledge, and for efficiency of information acquisition and transmission of information to others. Both evolve as a result of trial and error, but in science there is relatively more foresight, understanding, and planning.     

武汉市人口与零售商业网点分布优化配置研究

本文根据湖北和武汉统计年鉴等资料中的人口数据和社会商品零售额数据 ,拟合出反映人口分布和商业网点分布的计量模型。然后根据模型的含义 ,并综合考虑其它影响商业网点配置的因素 ,提出适合武汉市人口分布的商业网点优化配置的合理性建议     

嘉兴农村社会阶层分化对基层民主政治建设的影响

改革开放以来，嘉兴农村社会阶层发生很大的变化，出现了许多新的阶层。这对促进农村政治民主化的发展、完善目前正在实施的村民自治制度具有重要的作用。但应当看到目前嘉兴农村基层民主建设尚存在一些问题，这些问题的存在与农村阶层分化不到位，以及群体性和组织性不强有着直接的关系。正确认识农村社会结构变化的规律，不断增强它的群体性和组织程度，对促进农村政治发展的民主化具有重要意义。