Raising the bar (6)

Raising the bar (6). Spatial Economic Analysis. This editorial summarizes and comments on the papers published in issue 12(4) so as to raise the bar in applied spatial economic research and highlight new trends. The first paper addresses the question of whether ‘jobs follow people’ or ‘people follow jobs’. The second paper develops a new methodology to determine functional regions. The third paper is a major contribution to the growing literature on new modelling approaches and applications of disaster impact models. The fourth paper focuses on the costs and benefits of higher education. The fifth paper develops a two-step procedure to identify endogenously spatial regimes in the first step using geographically weighted regression, and to account for spatial dependence in the second step. Finally, the sixth paper estimates a dynamic spatial panel data model to explain house prices and to show that restricted housing supply in the city of Cambridge, UK, has some undesirable labour market effects.     

中国猪肉市场价格波动问题探析——基于生猪供方角度框架下

近年来,我国的猪肉市场价格波动幅度较大,猪肉价格也成了人们热议的主要话题,易涨易跌猪肉价格牵动着每个人的神经。猪肉市场价格剧烈波动的因素:生猪养殖散户锐减造成供应结构失衡;生猪养殖方式的改变造成成本提高;政府扶持不当加剧价格波动;猪肉产业化程度越来越高。实现中国猪肉市场价格稳定的对策:完善猪肉储备制度;构建猪肉信息平台;加强质量安全监督;转变政府扶持模式。     

农村居民点用地的调查与思考

通过对柯城区农居点的调查,找出其中存在的问题,并进行相应的分析,最后提出通过编制村镇建设规划,加强农居点用地动态管理,建立农村居民点用地整理资金保障机制,以及通过健全农居点用地法规等手段来解决农居点的散、小、多、脏、乱、差等现实问题。     

论征收补偿协议的行政法效力

房屋征收系政府行为,征收补偿协议系政府职能部门与被征收入签订的、解决征收补偿问题的法律行为。《国有土地上房屋征收与补偿条例》（以下简称《征收条例》）第25条规定：“房屋征收部门与被征收入依照本条例的规定,就补偿方式、补偿金额和支付期限、用于产权调换房屋的地点和面积、搬迁费、临时安置费或者周转用房、     

合作社生猪质量供给困境与治理研究——基于集体行动理论的视角

专业合作社成员在空间分布上呈现出明显的地缘性特征,使得合作社对生猪质量控制具有天然的优势,但仍无法避免成员“搭便车”的困境。文章以奥尔森的集体行动理论为指导,设计了选择性激励、允许成员异质性以及强制措施等治理机制,并通过对金诚众和合作社的案例分析,提出扶持合作社进行生猪品牌建设,提高生猪抽检比例,加强猪肉产品的认证管理等政策建议。     

The role of collaborations in the development and implementation of sustainable livestock concepts in The Netherlands

This paper discusses the role of collaborations in the development and implementation of sustainable livestock farming. The study reflects upon the experiences with two innovative pig farming concepts in the Netherlands that aim to address sustainability-related concerns regarding the economic viability, environmental impact and social responsibility of livestock production. The findings show that collaborations can result in smarter and innovative solutions and provide support in the development of more sustainable farming concepts. The study also shows that collaborations do not safeguard the implementing of these concepts in practice. Pioneers are confronted with higher production costs and the complex context of agricultural policies and regulations. These pioneering efforts are, however, the seeds for change, and the key ingredient for a transition towards more sustainable production. We rely upon their innovations, social networks and learning experiences in the transition towards more sustainable production. Therefore, pioneers need to be protected from market influences and regulatory barriers, and supported by intermediaries when developing novelties for a more sustainable agriculture. The findings emphasize the need for more knowledge exchange and understanding between farmers, policy-makers and researchers to navigate towards a more sustainable agriculture in the future.     

基于双目立体视觉技术的运动物体空间位置信息测量方法研究

为了使Delta机器人能够快速、准确地拾取随机出现在输送带不同位置上的不同高度的目标物体,设计了一套可获取运动目标物体空间位置信息的测量系统。利用LabVIEW与Matlab混合编程技术,同时结合双目立体视觉技术和图像处理技术以及光电传感设备,实现了对运动物体空间位置信息的准确获取。对该系统的测试方法和测试数据进行了实际检测和分析,检测数据表明,经过图像径向畸变矫正后,由该系统及测试方法获取的空间位置信息数据具有较小的相对误差。     

FDI与房价

本文在存量模型基础上,构建了一个外资参与的房地产市场局部均衡模型,考察了外资对房价的影响。理论模型显示,需求环节外资流入将导致房价上涨,开发环节外资流入将导致房价下降。本文使用中国35个大中城市1996-2010年的房地产市场和FDI数据,发现开发环节外资（FDI）对中国大中城市房价具有显著负向影响。另一方面,FDI与房价的影响是非对称的,FDI对房价的影响大于房价对FDI的影响。因此,为抑制高房价,在对需求环节外资（“热钱”）严格限制下,应鼓励外资进入房地产开发。此外,收入是影响房价的最主要因素;城市化越快,房价越容易上涨。     

Forecasting US real house price returns over 1831–2013: evidence from copula models

Given the existence of nonnormality and nonlinearity in the data generating process of real house price returns over the period of 1831–2013, this article compares the ability of various univariate copula models, relative to standard benchmarks (naive and autoregressive models) in forecasting real US house price over the annual out-of-sample period of 1874–2013, based on an in-sample of 1831–1873. Overall, our results provide overwhelming evidence in favour of the copula models (Normal, Student’s t, Clayton, Frank, Gumbel, Joe and Ali-Mikhail-Huq) relative to linear benchmarks, and especially for the Student’s t-copula, which outperforms all other models both in terms of in-sample and out-of-sample predictability results. Our results highlight the importance of accounting for nonnormality and nonlinearity in the data generating process of real house price returns for the US economy for nearly two centuries of data.     

House Prices,Wealth and Consumption: New Evidence from Australia and Canada

Over the past two decades, a number of countries have experienced appreciation in house prices at the same time that aggregate consumption has increased. This paper tests alternative hypotheses for this phenomenon by using repeated household surveys from Australia and Canada to identify the transmission mechanism that links consumption and household wealth. The empirical analysis suggests that neither a direct wealth effect nor a common causal factor likely accounts for the observed correlation between wealth and consumption in these two countries. Rather, indirect factors such as collateral effects arising from relaxation of credit constraints are a more likely explanation.