To cluster or not to cluster?: Understanding geographic clustering by restaurant segment

This study tested whether geographic clustering differs by restaurant segment due to the differences in consumers’ hedonic and utilitarian values by using Ripley’s K function and a Tobit model. This study found that higher priced restaurant segments have stronger clusters than lower priced restaurants, which implies that restaurants that focus on hedonic values tend to cluster more than utilitarian focused restaurants. However, the results differ depending on whether or not restaurants are located within a central business district (CBD). For example, quick service restaurants have stronger clusters than casual restaurants outside CBDs. Practical applications may apply to new restaurants that are attempting to open. Up-scale restaurants have the advantage of reducing research costs by locating near similar restaurants. Moreover, casual restaurants do benefit by clustering near existing ones under the condition that demand is not severely hurt by competition, while quick service restaurants benefit by diffusing from each other.     

粮食与经济重心迁移路径及空间耦合关系分析*——以湖北省粮食主产县为例

[目的]我国的粮食安全问题一直备受关注,作为粮食安全重要保障的粮食主产区近年来却面临着粮食生产与经济发展协调性、可持续性下降的困扰。文章以湖北省46个粮食主产县为研究区,对其粮食生产与经济发展的耦合协调状况进行研究,以期为地方政府粮食安全政策制定提供参考。[方法]以研究区粮食产量、地区生产总值、行政区划图层为数据源,构建重心模型和空间耦合模型,对粮食主产县2006—2015年间粮食重心和经济重心迁移路径、粮食生产与经济发展耦合协调状况进行分析。[结果](1)研究期间粮食主产县的粮食重心和经济重心整体上皆向西北方向转移,经济重心始终位于粮食重心东南部,经济重心的移动幅度大于粮食重心,但经济重心的移动方向更稳定。研究区北部的粮食生产地位高于南部,南部的经济地位则高于北部,粮食生产的稳定性相对低于经济发展。(2)两重心整体上虽均向西北方向转移,但具体移动方向存在较大差异,两者空间重叠性整体下降,变动一致性减弱,空间耦合性变差。(3)粮食生产与经济发展空间一致性地域分异特征明显,相较于2006年,2015年粮食经济整体协调性进一步减弱,粮食生产与经济发展日趋分散。[结论]建立重心模型和空间耦合模型对粮食生产与经济发展耦合协调状况进行研究是有效可行的,为推动粮食生产与经济发展协调稳步发展决策提供一定的参考。     

产业视角下环京津山区贫困县农业品牌建设路径研究*——以张家口市崇礼区为例

[目的]农业品牌建设是连接农业生产与市场消费的有效途径,是贫困地区特色农产品产销对接的重要抓手,在环京津贫困地区率先实现农业品牌建设的突破,示范意义重大。然而,针对贫困县的研究相对缺乏,农业品牌建设实践中脱离产业实际的问题比较常见,亟需路径探索。[方法]采用文献梳理、案例分析、实地和书面调研等方法,以张家口市崇礼区为例,对环京津山区贫困县农业品牌建设的现状进行分析,对路径与战略作出谋划。[结果]环京津山区贫困县的农业产业具有品质优势、错季优势和物流优势,受到资源短缺、投入不足、人才匮乏的限制,也面临居民消费升级、京津冀协同发展、产业扶贫等机遇。[结论]在产业视角下推进环京津山区贫困县农业品牌建设,应当重点实施品质农业发展行动,加强品牌营销,培育专业队伍,开展小而美、中高端、精准化的特色农业品牌建设。同时,建议上级有关部门在组织保障、政策倾斜、指导服务上给予有力支持。     

Unemployment durations and local labour market conditions

ABSTRACT

Unemployment durations vary across local authority districts in the UK. We explore the extent to which this variation is explained by differences in local labour demand as opposed to composition, business cycle and regional effects. We use seventeen waves of the British Household Panel Survey to identify the determinants of the duration of unemployment spells. Once we adjust for individual-level, business cycle and regional controls, we do not find evidence that living in a local authority district with relatively high unemployment is associated with longer spells of unemployment. This indicates that differences in labour demand operate at larger geographic scales, such as between large regions. Our findings have implications for the design of policies to help high unemployment districts.     

A social-media-based approach to assessing the effectiveness of equitable housing policy in mitigating education accessibility induced social inequalities in Shanghai,China

Social inequalities induced by education accessibility are widespread and concern land use policy makers globally. Yet much of existing research heavily emphasizes on uncovering the spatial patterns of housing price in relation to education resources. This paper aims to renew our understanding of this classical topic by bringing the importance of temporal and institutional dynamics to the fore. Specifically, this research presents a detailed examination of the relationship between school quality and housing rental dynamics under the intervention of equitable housing policy, with special reference to Shanghai, the most developed megacity in China, also one of the first Chinese cities granting equal rights for renters to access schools within the catchment area. Based on time-series housing rental data collected from social media, the t-test discovers that school quality has a significant impact on housing rental prices after the introduction of this new housing policy. Moreover, housing rental prices within high-quality school districts are significantly higher than those within ordinary school districts. The hedonic model and variance partitioning further confirm that school quality is capitalized into housing rental prices, and its relative contribution varies with temporal periods. More specifically, how the relative contribution of school quality changes over time is consistent with the schedule of primary school enrollment and sensitive to policy intervention. The difference in difference model foregrounds that the equitable housing policy does result in rental prices hike in high-quality school districts, i.e., a 13.5 % rental premium of housings within high-quality school districts compared with those within ordinary ones. We conclude that the equitable housing policy fails to achieve the expected goal and propose alternative suggestions for mitigating social inequalities in education accessibility. This study demonstrates a novel methodological framework for evaluating the social consequence of equitable housing policy based on social media data. It unravels how housing rental changes with school district division and the capitalization effect of school quality in housing rental prices.     

“刘易斯拐点”是否来临--基于四次农村社会调查资料的分析

本文利用2007—2013年间的四次农村社会调查资料,对农村劳动力及外出劳动力规模和结构变动趋势、农村外出劳动力工资价格和农业劳动力收入变动趋势等进行了统计分析。结果表明：农村劳动力规模下降和老化趋势明显,外出劳动力占农村劳动力总数的比例不断下降且回流比例不断提高,在外出劳动力工资价格大幅持续上涨的同时,农业劳动力收入水平也有了较大幅度的提高。这些条件基本可以印证我国已进入“刘易斯拐点”的判断。     

中央商务区管理模式创新探析

本文通过分析中国CBD现行管理体制的主要模式、发展现状和存在问题,比较国际、国内CBD不同管理模式的优劣,结合中国的法律政策和制度条件,借鉴国内外相关功能区、商务区管理体制改革和创新的成功经验,提出中国CBD管理体制与模式创新的政策建议。     

国际产业资本流入与中国“刘易斯拐点”出现的关系分析

当前,国际产业资本加速向中国转移,同时"刘易斯拐点"在中国出现已经广受认可。本文从理论上论证了国际产业资本促进"刘易斯拐点"出现的作用机制,应用计量分析方法检验了国际产业资本与第一、第二产业就业的相关性,检验结果表明,国际产业资本促进了第一产业就业减少和第二产业就业增加,一定程度上解释了"刘易斯拐点"的出现可能与国际产业资本向中国加速转移有着紧密的联系。     

广州开发区与上海张江高科技园生物医药产业创新对比

生物医药产业是全球公认的具有发展前景的战略性新兴产业，同时也是对专利保护具有高度依赖性的产业，美日欧等生物医药产业强国的经验表明，以园区为聚集形式可以快速拉动生物医药产业发展。从专利视角对广州开发区与上海张江高科技园的生物医药产业创新能力进行对比分析，解析广州开发区生物医药产业的发展现状以及存在的问题，提出了广州开发区生物医药产业发展的对策措施。     

车削圆柱中消除回转体锥度的创新方法

本文阐述了在车削加工专业的实习教学中,圆柱工件表面易产生锥度的原因,消除锥度的传统方法,在车工教学实践中发现的新方法可以方便、有效地消除锥度,具有实用性强的良好效果。通过介绍一种极为方便简捷的操作方法,采用运动合成原理,解决了普通或数控车床加工圆柱体过程中产生锥度的问题。