基于行为—结果—反馈的粤西北山区“十二五”高标准农田建设绩效评价及低效因子诊断

[目的]弥补现有绩效观的不足,提出并解析了基于行为—结果—反馈的土地整治绩效评价内涵,开展粤西北山区"十二五"高标准农田建设绩效评价及低效因子诊断。[方法]从实施行为、效益结果、调查反馈3个方面建立指标体系,采用熵权改进的TOPSIS法和障碍度模型量化评估绩效水平并诊断低效因子。[结果]粤西北山区各县市在组织实施、综合效益和调查反馈方面各有不足,"十二五"高标准农田建设绩效水平总体有待进一步提高,绩效评价结果具有显著的区域差异,罗定市绩效值最高,绩效水平为良好;英德市、蕉岭县、南雄市、仁化县的绩效水平为中级;郁南县、龙川县、始兴县、云安县的绩效水平为低级;对于粤西北山区大多数县(市),实施行为作为首位低效因子,对高标准农田建设绩效的贡献度最小。[结论]基于行为—结果—反馈的绩效观,采用熵权改进的TOPSIS法和障碍度模型的绩效评价,能够客观衡量研究区高标准农田建设绩效水平。增加田间道路建设、提高土地流转面积、加强专项工作经费落实对于提高粤西北山区高标准农田建设水平具有普适性。     

中国区域农业科技资源配置能力及比较优势研究*——基于省级农业科学院视角

[目的]通过测算各地区农业科技资源的配置能力,分析其比较优势并找出不足以便弥补差距,促进各区域农业科技配置能力的提高,为各地区农业经济的发展提供支持。省级农业科学院作为各省市规模最大、综合实力最强的农业科研机构,是农业科技创新的重要主体之一,分析其科技资源配置能力具有重要的现实意义。[方法]基于2009—2016年相关数据,遴选了有代表性的评价指标体系,运用突变级数法计算农业科技资源配置能力,运用NRCA模型定量分析农业科技资源配置效益的比较优势。[结果]山东农业科学院科技资源配置能力位居全国第一,甘肃、江苏、青海农业科学院分别在农业科技人力、物力、财力资源方面具有明显的比较优势。[结论]省级农业科学院科技资源配置能力区域差异十分明显,但区域格局变化不大,且大致与各地区经济实力相吻合;农业科技资源配置能力较高的农业科学院大多在农业科技物力资源配置效益方面具有比较优势,在农业科技人力、财力资源配置效益方面不具备比较优势。     

The Investment Performance of Art in Mainland China

This article investigates price determinants and investment performance for paintings from mainland China using hedonic regression analysis applied to a new dataset from over 190,000 auction transactions. The price index obtained indicates that from 2000 to 2015, the average annual appreciation in value of Chinese art was 8.42% in real USD. Compared with American artwork, global artwork, and traditional financial assets, Chinese art possesses a comparatively better risk and return profile and a low correlation with other assets. Finally, regarding the masterpiece effect, the conclusion is that highly priced Chinese art does not underperform the market.     

中国粮食虚拟水驱动效应与空间联动分析

以中国粮食虚拟水为主要研究对象,运用LMDI指数分解法,对粮食生产用水量的驱动效应进行分解,从结构、粮食产量、经济发展和人口规模4个重点驱动效应方面实行量化研究,并利用geoda软件求得莫兰指数,分析粮食用水量的空间相关性以及其各种驱动效应在省际间的影响,并针对中国粮食生产用水的现状提出建议。     

广西农业生态脆弱性评价及区划研究

［目的］随着经济的快速发展，我国各地区都面临着不同程度的农业生态脆弱性，通过研究特殊地形和气候下的农业生态脆弱性，有助于为农业生态环境的综合治理提供参考。［方法］文章以广西为例，通过构建评价指标体系，采用层次分析法和熵权法确定综合权重，通过构建综合评价模型对广西农业生态脆弱性程度进行评价，利用ArcGIS对生态脆弱性进行分级，以期探究广西农业生态脆弱性的空间分布情况。［结果］权重分析结果表明水蚀面积的权重值最高为0134，年平均降水量的权重值为0113，自然环境指标相对于农业生产和经济指标对农业生态脆弱性的影响更大。区划研究结果表明广西农业生态脆弱性区域大致可分为5个区域，分别是桂西峰丛洼地带、桂东山地丘陵地带、桂中低山丘陵地带、桂东北山地、桂南沿海丘陵地带。［结论］广西农业生态环境整体来看较为脆弱，处于轻度和中度脆弱等级，但生态环境问题仍不容忽视。为了改善农业生态脆弱性，政府应实行区域的联合防治，加大对农业生态环境的监督和治理，积极探寻生态、环保的农业发展方式，调整产业结构，改善农业生态环境的状态，促进广西农业的可持续发展。     

Pernicious pests and public perceptions: Wilding conifers in Aotearoa New Zealand

With significant favourable natural resources, New Zealand has excellent growing conditions for certain exotic conifer species. Although these species have been used for erosion control, and commercial and shelter/amenity plantings for many decades, they do have a high propensity to spread into undesirable locations around the country through natural means. These wilding conifers have become pests. Over the years, these pests have been controlled by landowners, government and community members using various methods, including mechanical and chemical means. Further, new ways of control have also been proposed, including the use of fire, genetics and other technologies. In this paper we examine survey and follow-up focus group data to understand public acceptance of these control methods. Overall, mechanical and selective chemical means were most accepted, while widespread chemical spraying and novel or alternative methods were less acceptable. The survey results and focus group discussions highlight the local, contextual nature of the challenges and opportunities.     

Research on a stock-matching trading strategy based on bi-objective optimization

In recent years, with strict domestic financial supervision and other policy-oriented factors, some products are becoming increasingly restricted, including nonstandard products, bank-guaranteed wealth management products, and other products that can provide investors with a more stable income. Pairs trading, a type of stable strategy that has proved efficient in many financial markets worldwide, has become the focus of investors. Based on the traditional Gatev–Goetzmann–Rouwenhorst (GGR, Gatev et al., 2006) strategy, this paper proposes a stock-matching strategy based on bi-objective quadratic programming with quadratic constraints (BQQ) model. Under the condition of ensuring a long-term equilibrium between pairedstock prices, the volatility of stock spreads is increased as much as possible, improving the profitability of the strategy. To verify the effectiveness of the strategy, we use the natural logs of the daily stock market indices in Shanghai. The GGR model and the BQQ model proposed in this paper are back-tested and compared. The results show that the BQQ model can achieve a higher rate of returns.     

The micro-foundations of strategic ambidexterity: Chinese cross-border M&As,Mid-View thinking and integration management

Chinese cross-border mergers and acquisitions (M&As) display several unique properties in relation to the ways in which their international business operations are organised and managed. Their seemingly puzzling ‘light-touch’ integration approach can be significantly understood from a strategic ambidexterity perspective: on the one hand, the ‘light-touch’ enables the exploitation of the targets’ existing knowledge bases; on the other hand, elements of the ‘light-touch’ facilitate the exploration of the new knowledge arising from the collaboration between targets and acquirers. However, an important theoretical gap remains: why do Chinese companies deploy such a strategic ambidexterity approach in their post-acquisition integrations? This paper aims to fill this gap by proposing Mid-View thinking as a micro-foundation of strategic ambidexterity in integration management from a cultural and philosophical perspective. To illuminate our conceptualization and argument, we conducted qualitative in-depth interviews with CEOs/high-level managers of acquired German companies. Communication approach and organizational control—as two critical aspects in integration management—reveal how Mid-View thinking can serve as a micro-foundation of strategic ambidexterity. We conclude this paper by presenting its theoretical contributions, managerial implications, and future research directions.