Spatial determinants of productivity growth on agri‐food Spanish firms: a comparison between cooperatives and investor‐owned firms

This study analyses the effect of the spatial factor, location, and interaction effects among peer companies, on the productivity growth of agri‐food companies in Spain. With this aim, we build a productivity growth index and apply a multiequational Seemingly Unrelated Regression on a sample of 344 Spanish cooperatives and investor‐owned firms for the period 2010–2012. Our findings show that agri‐food firms are influenced by spatial factors finding interesting differences between cooperatives and investor‐owned firms. With regard to the geographical location, cooperatives in the western of Spain show higher productivity growth rates, whereas investor‐owned firms in the northeast of Spain present better results. The interaction effect among closer peer companies is also a relevant factor to determine the productivity growth in agri‐food companies. This factor is more relevant for cooperatives than for investor‐owned firms.     

Negotiating climate change responses: Regional and local perspectives on transport and coastal zone planning in South Sweden

Putting climate change policy-integration into practice is challenged by problems of institutional misfit, due to, inter alia, deficient vertical administrative interplay. While most focus within the field of climate change research has targeted the national–local interplay, less is known about the interface of regional and local perspectives. Here, the aim is to study that interface with a specific focus on the relation between regional and local spatial planning actors, through a case-study of transport and coastal zone management in a Swedish municipality. The article is based on interviews (focus group and single in-depth) and official planning documents. The material reveals a tricky planning situation, replete with conflict. In practice, various institutional frameworks, claims and ambitions collide. The attempts to steer the local spatial planning initiatives from the regional level led to conflicts, which in turn seems to have hampered the overall work for climate change management through spatial planning. Furthermore, there are few traces of prospects of a smooth vertical institutional interplay able to support the overall aims related to integrating climate change mitigation and adaptation in spatial planning.     

基于GIS的铁路密度空间分异研究——以新疆铁路交通网络为例

城市对外交通中,铁路是发展较早的交通运输方式。本文以新疆的铁路交通网络为依据,以道路密度为指标,利用Arc GIS的叠加分析和空间分析功能,研究新疆铁路交通网络的空间分异,并分析新疆各区域人口、生产总值差异与铁路密度差异之间的相互关系。结果表明:(1)新疆铁路密度差异显著,大体呈现"南北低中部高"的趋势;(2)新疆各地区铁路密度与人口分布、生产总值高度正相关。     

产业集聚与两阶段区域创新绩效——基于区域技术要素强度门槛的实证研究

基于价值链视角,将区域创新活动分为知识创新阶段和成果转化阶段,使用2009-2020年我国内地30个省级面板数据,以区域技术要素强度为门槛变量,探讨产业集聚对两阶段区域创新绩效的不同影响。研究发现,产业集聚对区域创新绩效的影响在两个阶段具有显著的非线性门槛特征。在知识创新阶段,随着区域技术要素强度提高,产业集聚对区域创新绩效的促进作用呈阶段性增强;在成果转化阶段,当区域技术要素强度提高时,产业集聚对区域创新绩效的影响表现为先抑制后促进。     

产业转移加速进程中中国制造业集聚度再测算与演进

产业转移催化了中国制造业空间集聚的演变趋势。利用行业集中度指标和空间基尼系数指标测算了2008年金融危机以来中国制造业的集聚程度,根据测算结果,需要进一步诱导和推进沿海产业向中西部地区转移,同时实现中国与东盟各国产业梯度转移,东部沿海地区和中西部地区均可凭借自身优势吸引高新技术产业入驻,并积极嵌入全球价值链体系,沿海地区发展高技术产业要注意过度集聚和产能过剩问题。     

创新能力、空间依赖与长三角城市群增长核心演化

城市群经济系统发展过程中,核心城市的增长极化与扩散作用是推动城市群协同发展的关键机制。创新能力、要素集聚与扩散形成的区际空间外部性使得城市群增长核心不断演化,并形成系统协同发展的内在动力。长三角城市群核心城市的极化效应呈现出下降趋势,对其主要影响因素的实证分析结果表明：创新分工过程中创新要素集聚与创新溢出、空间依赖都对城市极化效应具有显著影响。因此,政策导向应从强化城市间创新分工、充分利用创新过程的空间外部性、推进城市群协同发展的制度创新等方面着手。     

低碳约束对产业集聚的门槛效应分析

产业集聚作为重要的产业组织形式,其影响因素一直是理论界研究的重点,但鲜有学者直接研究低碳约束对产业集聚的影响。基于2000-2012年中国内地30个省（市、自治区）的数据,利用门槛回归方法,从人均收入和人力资本两个角度,检验了低碳约束对产业集聚的门槛效应。收入门槛的检验结果表明,在中、低收入阶段,低碳约束抑制产业集聚,而在高收入阶段,低碳约束则显著促进地区产业集聚;人力资本门槛的检验结果表明,在高人力资本阶段,低碳约束能够显著带动地区产业集聚,在中低人力资本阶段则相反。     

地区规模、集聚外部性与区域创新能力

采用2005-2013年中国内地30个地区（除西藏外）27个工业行业数据,构建面板门槛模型,实证检验不同地区规模下,区域内多样化集聚（Jacobs外部性）、专业化集聚（MAR外部性）和企业竞争对区域创新能力的影响。结果显示,当地区规模较小时,多样化集聚、专业化集聚与企业竞争都对区域创新能力具有显著促进作用,但随着地区规模的日益增大,多样化集聚对区域创新能力的促进作用明显减小;专业化集聚、企业竞争与区域创新能力之间存在倒U型关系。     

国际人才流入是否影响我国FDI区位选择

根据相关经验研究及理论模型可知,国际人才流入可通过降低国际贸易壁垒提高贸易自由度。利用2006-2013年中国内地29个省市面板数据,实证分析了国际人才流入对FDI区位分布的影响。结果显示,国际人才流入与地区FDI水平显著正相关,但国际人才流入对FDI区位分布的影响存在一定区域差异。同时,国际人才流入与企业经营环境及地理集聚水平之间存在某种替代效应,即国际人才流入能够在一定程度上弥补由于企业经营环境缺失和地理集聚水平低下带来的负面影响。此外,良好的企业经营环境和较高的地理集聚水平也对FDI区位分布具有重要影响。上述结论对于我国进一步提升外商直接投资国际竞争力及促进我国FDI区域分布平衡具有重要理论参考价值,同时也对其它新兴发展中国家具有启示作用。     

产业集聚技术溢出与创新效应的经济学分析

溢出效应表现为从外部对经济主体带来利益或损失.本文讨论了产业集聚企业间技术创新相对溢出的问题,分析了产业集聚企业技术创新溢出效应,技术溢出与企业技术创新等问题,从而探求技术溢出与保护的博弈均衡途径.