基于生态位理论的浙江省区域农产品质量竞争力评价研究

[目的]把握区域农产品质量竞争力不仅是促进区域农产品富有竞争力的积极方法,也是稳步提升农产品质量安全的重要做法。[方法]文章运用生态位态势理论,构建了以区域为评价主体的农产品质量竞争力评价体系,并从两个层面对浙江省各地级市农产品质量竞争力进行研究。在纵向层面上,测算了各地级市农产品质量竞争力生态位宽度,对各地级市农产品质量竞争力状态进行了评价和排序。在横向层面上,测算了各地级市农产品质量竞争力生态位重叠度,对各地级市农产品质量竞争力的合作程度进行了评价与区分。最后整合运用生态位协同、生态位扩充等理论,提出浙江省各地级市提升农产品质量竞争力发展策略。[结果]通过区域农产品质量竞争力生态位宽度研究发现,杭州和宁波的农产品质量竞争力较强,其生态位宽度分别为0.103 6和0.103 2,而丽水和舟山农产品质量竞争力相对居后,其生态位宽度分别为0.079 0和0.075 6;通过区域农产品质量竞争力生态位重叠度研究发现,可将全省划分为西北平原区域、东南部沿海区域和西南部山地区域等3个区域,各区域内部地级市可通过协同合作提升农产品质量竞争力。[结论]根据各地级市生态位宽度和生态位重叠度的差异,应采取生态位扩充、生态位协同、生态位分离的策略,从而因地制宜提升区域农产品质量竞争力。     

Does economic policy uncertainty raise corporate precautionary cash holdings? Evidence from China

Using China as the research setting, this paper investigates the relationship between economic policy uncertainty and corporate precautionary cash holdings. Empirical results show a U-shaped relation between economic policy uncertainty and corporate precautionary cash holdings. Empirical analysis, in terms of ownership structure, firm size, corporate competitiveness and geographical location, further shows that (i) the effects for economic policy uncertainty in both state-owned and non-state-owned enterprises are significant, but the effect is stronger for state-owned enterprises; (ii) such significant effect is also found more strongly in small and medium-sized enterprises and highly competitive enterprises; and (iii) the effects for eastern, central and western China are all statistically significant, but the effect is strongest for eastern China.     

Designing a Model for Competitiveness Measurement of Selected Tourism Destinations of Iran (The Model and Rankings)

Destination competitiveness is the ability to sustain or improve market position and market share of a destination over a period of time. Different markets have different expectations which increase the importance of features a destination should provide in order to achieve competitive advantage. The results of this study show that the domestic model of Iran’s destinations competitiveness comprises 9 major indices. These indices are made of 64 variables which have been derived from literature reviews and qualitative surveys. The results of running the model for all selected destinations are consistent with the destinations’ tourist statistics except for one destination (Qom).     

中国农业竞争力提升视域下的小农户发展

目前我国农业发展面临一个急需破解的重大悖论：如何在发展小农户的基础上提升中国农业竞争力。论文提出中国特色农业竞争力具有三重内涵：以生产竞争力为基本要求，以安全竞争力为战略底线，以市场竞争力为主攻方向。小农户发展对于提升中国农业竞争力有重要作用，这体现于小农户发展有助于提升农业生产竞争力、安全竞争力和市场竞争力并推动提升机制之间联动。因此，提升中国农业竞争力必须促进小农户发展，并且小农户发展有提升农业竞争力的可能性，但当前小农户发展受到内外条件的约束。据此，本文提出以下政策建议：完善政府支持、发挥小农户主体作用、发展和推广农业科技和物质装备以及将小农户融入产业链。     

山西省特色农业产业集群集中度和竞争力分析*——以运城苹果、朔州羊肉、晋城大豆为例

[目的]文章选取了山西省3个具有代表性的特色农业产业集群(运城苹果、朔州羊肉、晋城大豆)进行研究,通过探索山西省特色农业产业集群发展的优势与不足,有助于提升产品竞争力和助力区域经济发展,进而达到促进农业发展、带动农民增收的目的。[方法]文章运用2005年、2010年、2015年3个时期的数据,首先基于波特的钻石模型分析了3个产业的发展情况,然后运用区位商和集中系数指标、产业效率优势指数和规模优势指数指标分别分析了3个特色农业产业集群的集中化程度和竞争力。[结果]从集中化程度来看,运城苹果产业发展进入成熟阶段,专业化程度和集中化程度近几年一直较为稳定,进一步提升空间不大;朔州羊肉产业处于大幅上升阶段,集中化程度明显,且优于专业化程度;晋城大豆产业专业化程度优势优于集中化程度优势,但二者均呈先升后降趋势。从竞争力评价角度来看,运城苹果产业已初具产业效率优势且稳定上升,规模优势稳定且变化不明显;朔州羊肉产业具有极高的产业效率优势且高位运行,规模优势稳定且处于成熟阶段;晋城大豆产业正在形成产业效率优势,规模优势近年来稍有下降。从综合比较优势来看,运城苹果产业处于成熟阶段,朔州羊肉产业具有极强的综合比较优势,晋城大豆产业受规模优势下降的影响而下降。[结论]总体来看,3个产业作为山西省的特色农业产业,其集中化程度和竞争力均较高,且具有发展优势和发展空间,区域布局合理,已经形成或正在形成特色农业产业集群,但同时也存在一定的问题。从微观层面来说,农户、企业等微观主体应该继续发挥产品的品质优势,同时努力扩大市场份额和拓展销售渠道,积极延伸产业链,加强与科研院所的合作;从宏观层面来说,应该加强政府支持和引导,减少市场风险的不确定性。     

Regional tourism competitiveness using the PROMETHEE approach

The competitiveness of tourism destinations is a key issue because it enables destinations to know their position with regard to their competitors. The aim of this paper is threefold: (1) to address the measurement of the competitiveness of tourism destinations at the regional level, (2) to show the suitability of using multi-criteria techniques to measure competitiveness, and (3) to apply the PROMETHEE and GAIA methods within a competitiveness study of eight tourist destinations located in the Northern Region of Portugal. The Metropolitan Area of Porto is the first in the ranking, followed by Cávado and Douro. The results of such an analysis show the comparative strengths and weaknesses of destinations, and allow them to identify their true competitors as well as those other destinations that are most similar to them.     

湖北省优化营商环境分析与优化研究

良好的营商环境对提升区域综合竞争力具有重大意义。本文采用近年湖北省营商环境相关数据,运用主成分分析法运算得分,从经贸环境、社会环境、基础设施、生态环境、服务环境等湖北营商环境指标,揭示相关政策措施对湖北省营商环境的促进作用,以期为相关部门完善优化营商环境政策,提升湖北省营商环境提供参考。     

京津冀城市大气环境竞争力评价

从大气环境与城市竞争力的关联性入手,将大气环境风险、现状和治理纳入评价指标体系,基于组合权重的大气环境竞争力评价模型,对2013-2017年京津冀13个城市的大气环境竞争力水平进行了测评,并结合空间自相关分析和障碍度模型揭示了其空间效应及障碍因素。结果显示:京津冀城市大气环境竞争力存在明显的空间差异,呈"北部高、南部低、局部跳跃"格局,城市差距逐渐缩小;京津冀城市大气环境竞争力呈显著的空间集聚效应且存在正向相关性,空间分布格局相对稳定。     

Spatial and temporal analyses of potential land use conflict under the constraints of water resources in the middle reaches of the Heihe River

With the rapid urbanization in China, land resources are becoming increasingly scarce. Identifying and resolving land use conflict is essential for reasonably using land resources and achieving land sustainability. Taking the middle reaches of the Heihe River as an example, we included the constraints of local water resources to construct a multi-criteria evaluation system for assessing land use competitiveness in 2000 and 2015 based on land use, socio-economic, and nighttime light data. By comparing the competitiveness of cultivated land, construction land and ecological land, we then derived the spatiotemporal patterns of potential land use conflicts. Actual land use changes supported the hypothesis that land use tended to convert into the type with higher competitiveness at areas with intense conflict, which better indicated that our assessment model was effective. The results showed that the potential land use conflict was more acute in the central and northwest but weak in the southeast and northeast, and its pattern showed a significantly positive spatial autocorrelation. The conflict between cultivated land and construction land was most prominent and mainly occurred in the transitional zone from urban to rural areas. Rapid urban development and water shortage were the main causes of the potential land use conflict. Assessing land use multi-functions and making a tradeoff among ecological, economic, and social services will be an effective way to guide future land use to solve land use conflict. Our research provides scientific evidence for sustainable land use planning and management in the arid areas.     

Bioelectricity in Malaysia: economic feasibility,environmental and deforestation implications

We investigate the economic feasibility of bioelectricity production from biomass in Malaysia and its impact on greenhouse gas (GHG) emissions and storage, agricultural prices, agricultural employment and deforestation. For this purpose, we develop a partial equilibrium model that projects agricultural prices, production, imports, exports, domestic consumption and land use in 5‐year increments between 2015 and 2065. Our results show that by 2030 biomass‐generated electricity can supply 36.5 per cent of the electricity generated in Malaysia, 16 times more than the 2016 electricity supply from biomass. Increased bioelectricity production from biomass will significantly reduce GHG emissions and will help Malaysia meet its commitment in the Paris Agreement to mitigate GHG emission by 45 per cent before 2030. Our modelling shows that biomass‐generated electricity creates a derived demand for waste biomass that expands the area of oil palm plantations. The expansion lowers agricultural prices, boosts agricultural employment and leads to some deforestation as landowners clear rainforest to plant oil palm trees. Nonetheless, the deforestation does not increase GHG emissions since GHG gains from bioelectricity significantly exceed GHG losses from deforestation.