Sustainability and forest transitions in the southern Yucatán: The land architecture approach

Consistent with the challenges of sustainability science, land architecture offers a comprehensive approach to land system dynamics useful for numerous types of assessments, ranging from the vulnerability of coupled human–environment systems to forest transitions. With antecedents in several research communities, land architecture addresses the tradeoffs within and between the human and environmental subsystems of land systems in terms of the kind, magnitude, and pattern of land uses and covers. This approach is especially cogent for changes in tropical forests, given the broad-ranging forces acting on them and the equally broad-ranging consequences of their loss. The rudiments of the land architecture approach are illustrated for changes in seasonal tropical forests in the southern Yucatán of Mexico, the pivot of which is the Calakmul biosphere reserve. Simplifying the dynamics involved, the region-wide land architecture is the collective design of stakeholders with different land-use goals that favor tradeoffs in subsystem outcomes serving better either the reserve and related programs or the smallholder farmers that populate the region. A major tradeoff involves forest cover per se, which holds implications for forest transition theory. Evidence for an incipient transition involves the scale of analysis taken. The dynamics involved hold too much uncertainty to forecast a permanent transition to more forest cover and imply that more complex but robust versions of the theory are required.     

Land management for erosion prevention: A case study for a Turkish nature reserve

As a result of landslides and soil erosion, a substantial amount of soil has been lost in Turkey. Particularly, fertile lands have long been faced with the threat of erosion, largely as a result of traditional (unplanned) land use practices. This threat is more evident in the Black Sea Region with its rough topography and rainy climate. The basic reason for this threat is the lack of organization in land use planning and control. Although proposals, in the context of this requirement, are included in national development plans, they have not been implemented. Accordingly, in this study research based on spatial data evaluation was carried out for Sera Lake located in Akcaabat, Trabzon, Turkey. For this purpose, temporal area, depth and volume changes of the lake were determined by utilizing topographic maps, aerial photographs and hydrographical measurements. To evaluate determined changes in the size of the lake and to produce suggestions to legislators for required sustainable land management activities, information on land use/cover types, land ownership and climate in the vicinity of the lake was utilized. As a result, it was determined that the area, depth and volume of the lake were significantly decreased during the last decades, as a consequence of erosion mainly caused by traditional land use practices; thus, the lake is threatened with the danger of extinction due to erosion. Precautions required for the alleviation of erosion and other adverse environmental effects which largely seem to be caused by harsh physical properties (caused basically by topography) of the region were discussed. In support of the information inherent to the region, traditional arable land use was logically determined as the basic non-natural factor (which is directly prone to erosion) to be rearranged in the context of sustainable land management. In this context, beyond nationwide actions (national agricultural policy and Soil Protection and Land Use Law), which may provide the required land management tools in the long term, it is proposed that planning and accordingly land management activities specific to the study area (Sera Valley) should immediately be commenced in close collaboration with the related public (owners or farmers). However, behaviours of different types of land users (engaged in commercial, subsistence and semi-subsistence farming) and also high number of owners and/or farmers (caused by small pieces of land parcels owned/used in shares) make the desired collaboration almost impossible. This socio-economical problem may be solved by further developing the current land registry and cadastre system in terms of customary land use rights, land use/cover changes and updating procedures.     

Is Chinas Fiscal policy Sustainable： An Empirical Research

本文简要回顾了财政可持续性（Fiscal Sustainability）相关研究文献，选择国际标准的计量经济学分析工具，选取适当模型对中国财政可持续性进行检验，并就不同情形下的财政可持续性所对应的赤字率进行模拟分析，具体分析了不同情境下通胀、经济增长、利息支付、铸币税等因素对可持续性财政赤字率的影响。综合分析后可以判断中国目前的财政状况基本属于可持续性状态，中国财政整体上仍处于健康状态，积极财政政策仍有作为的空间，但是对于地方政府债务等需要引起高度重视。最后，本文就财政政策调整提出合理的建议。     

Stochastic optimization of sustainable hybrid generation bioethanol supply chains

This paper focuses on designing a hybrid generation bioethanol supply chain (HGBSC) that will account for economic, environmental and social aspects of sustainability under various uncertainties. A stochastic mixed integer linear programming model is proposed to design an optimal HGBSC. A case study set in the state of North Dakota in the United States is used as an application of the proposed model. The results suggest that the designs of optimal HGBSC change when different sustainability standards are applied. In addition, sensitivity analysis is conducted to provide deeper understanding of the proposed model.     

Measuring the immeasurable — A survey of sustainability indices

Sustainability indices for countries provide a one-dimensional metric to valuate country-specific information on the three dimensions of sustainable development: economic, environmental, and social conditions. At the policy level, they suggest an unambiguous yardstick against which a country's development can be measured and even a cross-country comparison can be performed. This article reviews the explanatory power of various sustainability indices applied in policy practice. We show that these indices fail to fulfill fundamental scientific requirements making them rather useless if not misleading with respect to policy advice.     

Data Envelopment Analysis of different climate policy scenarios

Recent developments in the political, scientific and economic debate on climate change suggest that it is of critical importance to develop new approaches able to compare policy scenarios for their environmental effectiveness, their distributive effects, their enforceability, their costs and many other dimensions. This paper discusses a quantitative methodology to assess the relative performance of different climate policy scenarios when accounting for their long-term economic, social and environmental impacts. The proposed procedure is based on Data Envelopment Analysis, here employed in evaluating the relative efficiency of eleven global climate policy scenarios. The methodology provides a promising comparison framework; it can be seen as a way of setting some basic guidelines to frame further debates and negotiations and can be flexibly adopted and modified by decision makers to obtain relevant information for policy design. Three major findings emerge from this analysis: (i) stringent climate policies can outperform less ambitious proposals if all sustainability dimensions are taken into account; (ii) a carefully chosen burden-sharing rule is able to bring together climate stabilisation and equity considerations; and (iii) the most inefficient strategy results from the failure to negotiate a post-2012 global climate agreement.     

A resilience perspective of the SEEA

While the SEEA is an important advance in national accounting it remains deficient in a number of ways in regard to natural resources. The dynamic and interactive nature of ecosystems means that any linear, compartmentalised system of accounting will miss significant changes that influence human wellbeing. In particular, losses in resilience of critical capital stocks (through changes in underlying ecosystem variables that do not contribute directly to valued flows, and are therefore not included in the accounts) means that the accounts will not recognise that such stocks are becoming riskier, likely to collapse, and are therefore over‐valued. We present a stock‐based approach to measuring sustainable development (the Inclusive Wealth Approach of [Arrow KJ, Dasgupta P and Maler K‐G. (2003) Evaluating projects and assessing sustainable development in imperfect economies, Environmental and Resource Economics, 26:647-685]) at a regional scale, using an example from South East Australia, which includes an assessment of the resilience of critical capital stocks.     

Regional sustainability: How useful are current tools of sustainability assessment at the regional scale?

Sustainability assessment methods are primarily aimed at global, national or state scales. However, modelling sustainability at finer spatial scales, such as the region, is essential for understanding and achieving sustainability. Regions are emerging as an essential focus for sustainability researchers, natural resource managers and strategic planners working to develop and implement sustainability goals. This paper evaluates the effectiveness of current sustainability assessment methods - ecological footprint, wellbeing assessment, ecosystem health assessment, quality of life and natural resource availability - at the regional scale. Each of these assessment methods are tested using South East Queensland (SEQ) as a case study. It was selected because of its ecological and demographic diversity, its combination of coastal and land management issues, and its urban metropolitan and rural farm and non-farm communities. The applicability of each of these methods to regional assessment was examined using an evaluation criteria matrix, which describes the attributes of an effective method and the characteristics that make these methods useful for regional management and building community capacity to progress sustainability. We found that the methods tested failed to effectively measure progress toward sustainability at the regional scale, demonstrating the need for a new method for assessing regional sustainability.     

利益相关者关系影响公司财务绩效持续性的实证研究

基于123家沪深 A 股上市公司的样本数据,运用时间序列自回归模型;考量卓越与不良绩效企业股东、管理人员、员工、消费者、债权人和政府与财务绩效持续性的关系。结果表明,良好的利益相关者关系与卓越财务绩效的持续性正相关,与不良财务绩效的持续性负相关。不同的利益相关者对财务绩效持续性的影响存在差异,消费者和员工是保证卓越财务绩效持续性的最重要因素,也是陷入财务困境的企业实现业绩转向的关键推动力量。当企业经历财务困境时,股东的积极作用表现突出。