Species protection from current reserves: Economic and biological considerations, spatial issues and policy evaluation

The expansion of nature reserves is an important public policy strategy for the protection of biological diversity. In this paper, the authors use integer programming model structures derived from Location Set Covering Problem and Maximal Covering Location Problem approaches of location science as tools for selectively augmenting nature reserve sites for special status species protection. The linear programming models presented incorporate the following: biological constraints in the form of species' area needs; economic constraints in the form of opportunity costs of converting smaller administrative districts into nature reserves; and spatial constraints in the form of required connectivity among districts in site selection. The construction of a taxonomic data set for Thailand enables the implementation of the models, the comparison of results and evaluation of the differences in outcomes. The models build upon the existing nature reserve network in Thailand and suggest various public policy options that would augment the reserves for enhancing species protection and for possibly improving national conservation efforts at lowest costs.     

Site accessibility and prioritization of nature reserves

Nature reserves not only protect habitat-stressed species but also provide recreation and welfare services to people. Therefore, site accessibility matters in reserve design. This study incorporates public accessibility, determined by urban populations and distances between urban areas and reserve sites, as an additional factor in conservation reserve design besides species representation and economic characteristics of individual sites. An optimization approach is introduced to determine a reserve network with maximum accessibility while satisfying specified representation targets under financial constraints. The paper also presents an empirical application of this approach to endangered/threatened birds in Illinois, USA, and analyzes the tradeoffs between ecological, economic, and social objectives of biological conservation. The results show that: i) the conventional minimal representation approach would result in a small reserve network, but this network would have poor accessibility; ii) public accessibility can be improved significantly by selecting alternative sites with the same amount of conservation budget; iii) further improvement in accessibility can be achieved by enlarging the network, but in this particular case the gains would be insignificant after the first few additional sites; and iv) a regionally integrated conservation plan, as opposed to decentralized conservation efforts, is beneficial for both species protection and social welfare.     

Spatial patterns and economic contributions of mining and tourism in biodiversity hotspots: A case study in China

Mining activities and tourism are both growing fast in biodiversity intense areas globally. However, the dynamic and interactions between mining and tourism when they both occur in biodiversity hotspots, and how they together may impact the economy and environment in these biodiversity rich areas, remain unclear. This paper examined how the two industries interact in terms of their economic contributions and spatial patterns in a biodiversity hotspot, Yunnan, China. We used correlation analyses to measure the relationships between mining activities, tourism visits and local gross domestic productions. We also employed a distance-based technique to investigate the nature of any dependency between mining and tourism sites. Results showed that mining activities tend to be in relatively fluent areas while tourism tends to occur in less developed areas. Our results showed that the location of tourism and mining sites are likely to be close to one another but the two industries usually perform better economically when they are apart from each other. These findings can provide insights on how mining and tourism together may impact the economy and environment in biodiversity rich areas, and provide important information for managers and planners on balancing mining and tourism development in these areas.     

Involuntary excess reserves,the reserve requirements and credit rationing in China

Using a sample of 95 banks that covers the period 2000–2011, this article examines Chinese banks’ credit lending behaviour in response to the changes in the reserve requirement ratio in the presence of involuntary excess reserves (IERs) in the banking system. The study finds that Chinese banks with positive IERs one period after a reserve requirement shock experience a significantly increased credit supply in response to an increase in reserve requirement ratio. However, the reserve requirements have no significant impact on the credit supply in Chinese banks that have negative IERs one period after a reserve requirement shock. This article sheds lights on the effectiveness of Chinese monetary policy, which uses reserve requirements as the primary tool to sterilize excess liquidity and restrain credit expansion.     

创新集聚的空间分布与空间关联模式

文章以专利数据作为衡量创新产出的指标,借鉴产业地区平均集中率指标和市场集中度指标,系统描述并分析了1993—2007年中国制造业创新产出的空间分布格局和区域结构特征。针对我国创新产出的空间集聚特征,利用空间自相关指数Moran＇s I对专利申请数进行空间自相关性检验,以识别我国创新产出的空间聚集是随机分布的,还是存在一定的分布规律和必然的内在联系。     

Accounting for the ecosystem services of migratory species: Quantifying migration support and spatial subsidies

Migratory species support ecosystem process and function in multiple areas, establishing ecological linkages between their different habitats. As they travel, migratory species also provide ecosystem services to people in many different locations. Previous research suggests there may be spatial mismatches between locations where humans use services and the ecosystems that produce them. This occurs with migratory species, between the areas that most support the species' population viability - and hence their long-term ability to provide services - and the locations where species provide the most ecosystem services. This paper presents a conceptual framework for estimating how much a particular location supports the provision of ecosystem services in other locations, and for estimating the extent to which local benefits are dependent upon other locations. We also describe a method for estimating the net payment, or subsidy, owed by or to a location that balances benefits received and support provided by locations throughout the migratory range of multiple species. The ability to quantify these spatial subsidies could provide a foundation for the establishment of markets that incentivize cross-jurisdictional cooperative management of migratory species. It could also provide a mechanism for resolving conflicts over the sustainable and equitable allocation of exploited migratory species.     

Poverty and biodiversity: Measuring the overlap of human poverty and the biodiversity hotspots

In an effort to prioritize conservation efforts, scientists have developed the concept of biodiversity hotspots. Since most hotspots occur in countries where poverty is widespread, the success of conservation efforts depends upon the recognition that poverty can be a significant constraint on conservation, and at the same time conservation is an important component to the alleviation of long-term poverty. In this paper we present five key socio-economic poverty indicators (access to water, undernourishment, potential population pressure, number living below poverty line and debt service) and integrate them with an ecologically based hotspots analysis in order to illustrate magnitude of the overlap between biological conservation and poverty. The analysis here suggests that the overlap between severe, multifaceted poverty and key areas of global biodiversity is great and needs to be acknowledged. Understanding the magnitude of overlap and interactions among poverty, conservation and macroeconomic processes is crucial for identifying illusive, yet possible, win-win solutions.     

基于新疆经济增长的财政支出最优规模估算

财政支出规模反映了政府对经济的干预程度,然而财政在支出过程中有个量的把握,即占GDP的比重存在一个最优值。在最优值以内,财政部门为私人企业提供公共产品以及弥补外部性等,提高财政支出能够提高经济增长率,当财政支出超过这个最优值时,税收的扭曲作用会不断加强,增加财政支出对经济增长起阻碍作用。将财政支出纳入生产函数模型中,通过实证分析,估算出新疆的最优财政支出规模。     

Optimal size, optimal timing and optimal financing of an investment

Corporate investment is an important determinant of economic well-being. The existing literature identifies optimal investment size and timing without the possibility of debt financing, as well as the effect of debt financing on investment timing without the option to choose investment size. This paper contributes to the literature by identifying the optimal size, optimal timing and optimal financing for an investment when the firm controls all three decisions (as it usually does in practice). The investment size and investment trigger are generally positively related: when investment is delayed (accelerated) it is larger (smaller) in size, thus the overall effect on investment is ambiguous. However, when tax rate or bankruptcy cost is increased, the trigger rises and size falls, hence the effect on investment is unambiguously negative. The effect of debt financing on investment depends on the amount of debt used; with the optimal amount of debt, investment is delayed relative to the no-debt case, and this delay can be economically significant; however, the investment, when eventually made, will be larger in size. Overall, it is not appropriate to ignore either the firm’s ability to choose investment size or its option to use debt financing, when modeling the investment decision.     

Economic prosperity, biodiversity conservation, and the environmental Kuznets curve

Many conservationists contend that economic growth and biodiversity conservation are incompatible goals. Some economists contest this viewpoint, arguing that wealthier countries have the luxury of investing more heavily in efforts to conserve biodiversity. Under this assumption, we expect a U-shaped relationship between per capita wealth and proportion of species conserved. We test this environmental Kuznets curve (EKC) using estimates of per capita income and deforestation rates (index of biodiversity threat) for 35 tropical countries. A prior analysis [Dietz, S., Adger, W.N., 2003. Economic growth, biodiversity loss and conservation effort. Journal of Environmental Management, 68:23-35] using conventional regression techniques failed to provide any support for the parabolic relationship predicted by the EKC hypothesis. Here, we introduce the use of quantile regression and spatial filtering to reanalyze this data, addressing issues of heteroskedasticity and spatial autocorrelation. We note that preliminary analysis using these methods provides some initial evidence for an EKC. However, a series of panel analyses with country-specific dummy variables eliminated or even reversed much of this support. A closer examination of conservation practices and environmental indicators within the countries, particularly those countries that drove our initial support, suggests that wealth is not a reliable indicator of improved conservation practice. Our findings indicate that an EKC for biodiversity is overly simplistic and further exploration is required to fully understand the mechanisms by which income affects biodiversity.     

Economies of scale,school violence and the optimal size of schools

This article argues that policy in relation to education has relied too extensively on the more easily measured costs of production to support a common conclusion of economies of scale in school and/or district size. It argues that there are external costs that increase with size but that can be measured less easily that offset this case. This would imply that the tendency within the education profession to advocate ever-larger school sizes is premature at best. To make the case, it models the choice of school size to emphasize that costs, such as school violence, born by both students and their parents but not (necessarily) by education administrators may result in school sizes that are too big from the perspective of school users. The second and third parts of the article introduces evidence to suggest that school violence is one of these external costs.     

Income distribution, market size and the evolution of industry

An industry typically experiences initial mass entry and later shakeout of producers over its life cycle. However, the timing of the evolution varies substantially across markets. By exploring the dynamic interactions between technology progress and demand diffusion, our theory suggests that the cross-market differences of industrial evolution are largely the result of underlying demand factors. Particularly, higher consumer income or larger market size tends to drive faster demand diffusion and earlier industry shakeout. A comparative study on the US and UK television industries supports the theoretical findings.     

David Pearce and the economic valuation of biodiversity

David Pearce was a pioneer in the economic valuation of biodiversity. His work powerfully influenced both later economists who worked in the field and natural scientists and practitioners who gained and appreciation of the importance of economics to their efforts. Pearce often applied the paradigm of demonstration followed by appropriation: the values of biodiversity must first be demonstrated to those who make decisions concerning its survival, and then appropriated by them. The later step will be possible when market and policy failures are rectified so as to allow the realization of conservation values. While Pearce wrote extensively on these themes, he was also acutely aware of the limitations of the paradigm. Rosy projections of values that could not be realized and appropriated would be of little practical use, and Pearce often cautioned against excesses of optimism. Yet he also clearly believed that there are compelling, if not always easily demonstrated, reasons for conservation. I argue in this paper that Pearce’s seminal work on the valuation of biodiversity cannot be understood without some appreciation of his philosophical perspective. Pearce would have described himself as a pragmatist. However, his pragmatism was grounded in the belief that it is both expedient and ethical to recognize that communities in some of the poorest corners of the world will only conserve biodiversity if they are justly compensated for the sacrifices they must make to do so. Associate Professor of International Policy, Paul H. Nitze School of Advanced International Studies, Johns Hopkins University; Economist, National Center for Environmental Economics, United States Environmental Protection Agency; and Research Associate, Elliott School of International Studies, George The opinions expressed here are those of the author, and do not necessarily express the views of the United States Environmental Protection Agency.     

The Armington assumption and the size of optimal tariffs

There has been commentary on the seeming success of the world trading system in responding to the large shock of the 2008 financial crisis without an outbreak of retaliatory market closing. The threat of large retaliatory tariffs and fears of a 1930s style downturn in trade have been associated with numerical trade modelling, which projects post retaliation optimal tariffs in excesses of 100%. In the relevant numerical modelling, it is common to use the Armington assumption of product heterogeneity by country. Here, we argue and show by numerical calculation that the widespread use of this assumption gives a large upward bias to optimal tariffs, both first step and post retaliation, relative to alternative homogenous good models used in trade theory. The reason is that optimal tariffs equal the inverse of the foreign export supply elasticity and are negatively related to the elasticity of the foreign offer curve. The Armington assumption model has a much more bowed foreign offer curve, which generates unrealistic larger optimal tariffs.     

Ecological services to and from rangelands of the United States

The over 300 million ha of public and private rangelands in the United States are characterized by low and variable precipitation, nutrient-poor soils, and high spatial and temporal variability in plant production. This land type has provided a variety of goods and services, with the provisioning of food and fiber dominating through much of the 20th century. More recently, food production from a rangeland-based livestock industry is often pressured for a variety of reasons, including poor economic returns, increased regulations, an aging rural population, and increasingly diverse interests of land owners. A shift to other provisioning, regulating, cultural, and supporting services is occurring with important implications for carbon sequestration, biodiversity, and conservation incentives. There are numerous goods and services possible from rangelands that can supply societal demands such as clean water and a safe food supply. The use of ecologically-based principles of land management remains at the core of the ability of private land owners and public land managers to provide these existing and emerging services. We suggest that expectations need to be based on a thorough understanding of the diverse potentials of these lands and their inherent limits. A critical provisioning service to rangelands will be management practices that either maintain ecological functions or that restore functions to systems that have been substantially degraded over past decades. With proper incentives and economic benefits, rangelands, in the U.S. or globally, can be expected to provide these historical and more unique goods and services in a sustainable fashion, albeit in different proportions than in the past.     

中国自然保护重要历史文物——福建天宝岩禁碑的发现与科学价值

中国古代文化具有朴素的自然保护观,禁约文化和禁碑在历史上对自然资源的保护曾起到过重要作用。2002年,在福建天宝岩国家级自然保护区发现了反映中国自然保护史的重要文物——三块文字完整的清朝禁碑。通过对碑文文字的辨识和解读,我们发现禁碑的主要内容除了严禁采伐竹木、保护好森林外,还包含着许多规范乡民生产、生活方式的内容,而且具备了比较全面的就地保护的管理办法,从中可以看出我国最早的自然保护区的雏形。文章讨论了禁碑对于自然保护的历史意义,指出它们对于塑造和保持群众的自然保护观念以及协调自然保护与生产生活的关系等方面具有重要作用,对于研究自然保护区的管理和立法具有重要的科学价值,对于在当前保护区管理中做好社区宣传、联防、共建管理等方面的工作也有很强的借鉴意义。     

Exploratory spatial data analysis of the distribution of regional per capita GDP in Yangtze Delta, China: 1994-2004

Based on the spatial economy theory and the exploratory spatial data analysis (ESDA) technology, this paper studies the space-time dynamics of regional per capita GDP in the Yangtze Delta. A sample of 74 regions in the Yangtze Delta over the period of 1994 to 2004 provides clear evidence of global and local spatial autocorrelation as well as spatial heterogeneity in the distribution of regional per capita GDP The dynamism of regions is investigated by exploring the spatial pattern of regional growth, compared with that before 1997, the economic growth disparities among Shanghai, Zhejiang and Jiangsu provinces have decreased, so have the inside regions of Zhejiang Province, while it is opposite to the inside regions of Jiangsu Province.     

The effect on income distribution of development,the growth rate and economic strategy

An analysis of cross-section and time series data for 83 countries confirms some, and contradicts other work on income distribution. New findings include: a dualistic socio-political system is highly unfavorable for equality. Neither the extent of government intervention in the economy nor the rate of manufactured exports are systematically related to income distribution. The analysis confirms that there is no systematic relationship between equality and the rate of economic growth. Educational participation and a reduction in the share of primary exports in GDP are both favorable for equality. There is some support for the Kuznets hypothesis that inequality increases as per capita income rises to about $400 and then declines, with further income increase, but the empirical support is not strong and may be weakening over time. These findings lead to more optimistic conclusions then other work: that rapid growth in a mixed economy is quite consistent with unchanged, or even improved, income distribution, even at early stages of development.     

Fiscal policy,government debt,and economic growth in the Kaleckian model of growth and distribution

This article presents the Kaleckian model of growth and distribution that sets a budget deficit ratio as an indicator of fiscal policy and examines the short- and long-run effects of an increase in budget deficits and a rise in income tax rates on the economy. The key short-run outcomes are as follows. First, expanded budget deficits have a positive effect on the rate of capacity utilization. Second, the tax rate for wage income does not affect the rate of capacity utilization, whereas the tax rate for capital income has a favorable impact on it. This result implies that raising the tax rate for capital income can be an important policy instrument for stimulating the economy. Third, we find that the economy exhibits a wage-led aggregate demand in the short run. The main long-run results are as follows. First, the effect of expanded budget deficits on the growth rate is ambiguous, since a higher debt burden negatively influences the rate of capacity utilization and hence economic growth, despite the increase in demand caused by government borrowing. A higher budget deficit ratio thus raises the growth rate only if a certain condition is satisfied. Second, the tax rate for capital income has a positive impact on the growth rate. Third, the economy shows a wage-led growth in the long run.     

空间动态外部性、企业异质性与出口决定——基于中国制造业企业面板数据

本文利用2005～2007年中国制造业企业平衡面板数据集,研究了空间动态外部性和企业异质性对企业出口决定的影响.我们分别采用Probit和Tobit模型对企业出口倾向与出口强度进行估计,经验研究发现企业异质性指标包括企业规模、经营年限、创新水平、人力资本、外资属性均对企业出口决定有显著正影响.MAR外部性对企业的出口决定有显著的正效应,而空间外部性因素对劳动密集型企业出口决定的作用更为明显.