基于GWR模型的合肥居住地价影响因素研究

以合肥市主城区为例,基于2010-2014年居住用地的出让数据,运用地统计法、GWR模型等方法,对合肥市居住地价的空间异质性及其影响因素进行研究。研究表明：①合肥市居住地价的空间分布呈现出显著的多中心的空间结构,地价的峰值区分别以老城区、政务区天鹅湖及滨湖新区塘西河公园为中心呈现圈层式分布;②不同的地价影响因素表现出不同的空间分布特征,其中容积率对居住地价的贡献度空间差异最大,其次是宗地面积,主干路次之,交通站点对居住地价的贡献度最小;③厘清各影响因素对地价的作用机制,建立动态的数字地价模型,不仅能促进土地资源的集约利用,重塑城市的空间结构,而且能为城市整体价值的发挥提供重要的理论支撑。     

SPATIAL PRICING IN INTERDEPENDENT MARHETS*

ABSTRACT. Conditions for spatial price equilibrium are derived for a set of firms in oligopolistic spatial competition, distributed at fixed locations in a heterogeneous region where consumer purchasing patterns are a probabilistic function of the price distribution rather than a deterministic function of proximity to firms. The resulting prices vary with accessibility to consumers or with the degree of local spatial monopoly, and result in non-zero profits for firms. Conditions describing the existence and stability properties of this spatial price equilibrium are defined, and are shown to be equivalent for two different hypotheses concerning disequilibrium pricing behavior: a partial price adjustment model and a Bertrand game. For two different profit goals, total profit maximization and profit rate maximization, it is shown that a spatial price equilibrium exists and is at least locally quasi-stable.     

THE WELFARE ASPECTS OF SPATIAL PRICING POLICIES RECONSIDERED FOR A MONOPOLY CASE*

ABSTRACT. We reexamine the price structures and their welfare implications in three pricing regimes (mill, uniform and discriminatory) for a monopoly. We show that spatial price discrimination could provide the highest social welfare and, when consumers tastes are heterogeneous enough, also the highest consumer surplus. The superiority of spatial price discrimination is partially due to the larger output produced and partially due to differential treatment for consumers with heterogeneous tastes.     

Distance and social interaction in a Victorian city

The paper examines patterns of marriage in a small industrial city—Huddersfield—between 1850 and 1880, when the residential structure of the city was becoming more modern in its spatial organization. The need to interpret distance-decay patterns of interaction in their social context is stressed. The apparently unchanging relationship between physical distance and frequency of interaction is related to the balance between changing patterns of individual mobility, class consciousness and scales of residential segregation. The more extensive interaction fields of the rich are attributed to their greater mobility, but also their lower population density. The close-knit patterns of the poor reflect their higher population density and more particularly the segregation of the Irish community. Finally, the differences between normative (within-class) and non-normative (between-class) marriage distances are considered. It is suggested that physical distance operated independently of social distance, although this conclusion requires further testing at different scales of analysis, and using information on forms of interaction other than marriage.     

UNIFORM SPATIAL PRICING

ABSTRACT Uniform spatial pricing means that a firm delivers its product to any customer at a fixed price, independent of location. Economic theory explains the use of uniform pricing by the added profit generated by absorbing freight charges of distant customers. I extend this insight by demonstrating that when demand elasticity and transportation cost are positively enough correlated, uniform pricing generates higher profits than mill pricing. I show that this result can better explain observed patterns of price policy choice by mail order and web firms. A second result is application of this idea to firms with many shipping facilities.     

THE SPATIAL STRUCTURE OF HIERARCHICAL INTER-URBAN SYSTEMS: EQUILIBRIUM AND OPTIMUM*

In this paper, I model a simple hierarchical inter-urban system in which the location of business firms is considered together with the determination of residential land-use patterns. By supposing a spatial externality between the business firms and all the residents of the region, three spatial structures are obtained: monocentricity, multicentricity, and a separate pattern where cities are spatially split with an agricultural land existing between them. It is also shown that the spatial structures of monocentric and multicentric patterns formed by the market principle tend to be more concentrated than the optimum.     

SPATIAL COMPETITION WITH CONSISTENT CONJECTURES*

ABSTRACT Equilibrium in spatial models invariably depends on firms' conjectures about how competitors will react to their price changes. This paper analyzes spatial price and location equilibrium when firms hold consistent (i.e. correct) conjectures. Most spatial models assume an exogenous conjecture. Consistent conjectures are one method, albeit a controversial one, for endogenizing the conjecture. We show that the consistent conjecture about a competitor's reaction to a price change in the simplest case is 1/3. When demand is elastic the consistent conjecture is a decreasing function of the radius. It is always below 1/3 and can be negative. In the third model, we show that the consistent conjecture declines as the number of dimensions and the number of competitors increases.     

长春市住宅价格空间分异与影响因素研究

基于持续年份住宅数据、利用空间热点分析和地理加权回归模型，对2011年以来长春市住宅价格分布的空间分异现象和住宅价格影响因素分布的空间异质性进行研究。结果显示：①近年来长春市住宅小区存在向内填充与向外扩散并进，圈层扩展和扇形放射融合的演化趋势，其中西南-东南扇面是居住空间扩展的主要方向；②2011年以来长春市住宅价格呈现出以南部为指向的扇面增长的空间特征，高价住宅街区由点状分布到片状扩散。通过半变异函数和冷热点聚类分析方法指出，长春市住宅空间的南北分异现象显著，住宅价格的低值与高值聚类以铁路为界线存在显著的空间隔离；③就POI数量而言，住宅小区周边银行保险、医疗、住宿、休闲娱乐数量对住宅价格产生较强影响，同时以上因素作用效应的空间差异性同样显著。     

差异分权与多元碎化:大都市边缘地区城镇化空间模式研究——基于武汉市蔡甸区的实证

大都市边缘地区是大都市经济增长与空间拓展的主要地域,也是分权化治理最为复杂的区域。大都市边缘地区往往针对不同主体采取不同模式的分权化来调整其空间治理结构以适应发展需求。本文构建从分权化治理到城镇化空间的逻辑框架,从大都市边缘地区"差异分权"的空间治理格局入手,落脚在"多元碎化"的城镇化空间模式上,进而对从空间治理的"差异分权"到城镇化空间模式的"多元碎化"间的制度逻辑进行了解析,认为差异分权格局是当前大都市区边缘地区城镇化空间模式多元碎化的直接诱因,因此新型城镇化迫切需要从治理结构上予以破解。     

Incorporating the effects of spatial structure in discrete choice models of migration

Discrete-choice theory and logit models are evaluated for their usefulness in analyzing migration patterns in a zonal system. The authors "argue that spatial effects and more specifically the relative location of zones are not taken into account in such analyses. We, therefore, introduce a measure of spatial structure and advocate its usage as a predictor of migration in such models. In an example of intrametropolitan migration in Toronto [Canada], we demonstrate that this variable is not only significant but also it improves the performance of all the other variables with the greatest impact on the distance between zones. In addition, inclusion of this variable improves the overall performance of the model in terms of residuals."     

基于最优插值函数优选的小城镇商业用地地价空间结构分析——以西安市蓝田县城区为例

根据在西安市蓝田县城区调查的商业用地地价资料,利用ArcGis软件,从8种常用的插值方法中,以估计值与观察值的标准差最小为原则,筛选出适合于商业用地建立GRID数据的最优插值函数为克里金指数半变差函数模型,并利用该模型建立了商业用地的地价面,在此基础上对商业用地的地价空间结构进行了分析。结果表明:小城镇商业用地地价的变化呈同心圆结构,即城市中心区地价最高,向外逐渐降低。商业用地地价与道路两侧的商店密度性、临街道路的类型以及文化娱乐设施的分布密度正相关,相关系数分别为0.946、0.693和0.659;而与金融保险机构的个数以及土地所有权的性质相关性不强。     

ZONE PRICING*

ABSTRACT. Our purpose is to study a spatial price policy often encountered in the real world, known as zone pricing. This price policy consists in determining simultaneously several delivered prices together with the geographical zones in which they apply. It is shown that zone pricing approximates perfect spatial price discrimination and that the firm's profit increases with the number of zones. Furthermore, the number of markets supplied by the firm rises with the number of zones. Finally, zone pricing is compared to other standard spatial price policies and possible extensions are discussed.     

DOUBLE TRANSITIONS? REGIONAL PATTERNS OF POPULATION AGEING IN POLAND

The number and geographical distribution of the aged, and how the distribution changes over time, have captured the attention of geographical gerontologists; the complexity and spatially differentiated nature of ageing is of considerable practical and theoretical import. This article seeks to link the traditional concerns of population geography to the social and spatial relations between old people, their health and places of residence and care. It does presuppose, however, that patterns and processes at the sub‐national level are also taken into account. Therefore, the aim of the article is to identify the aged and the localities or regions where they reside, within the particular context of a Polish post‐socialist society that has recently become integrated into the European mainstream. As such it is potentially subject to a double transition, where the political and economic changes cross path with the second demographic transition. To identify interrelationships between ageing and post‐socialist transition, areas vulnerable to ageing are defined using ageing indices. Projections of the share of elderly up to 2030, based on a component cohort method, are made with a view to identifying future change in the spatial patterns of ageing. Regional patterns of ageing are presented in social, political or economic context, to show their relation to the structural changes that societies such as Poland have been passing through during the period of transition to democracy and a market economy or are likely to go through in the near future.     

Hard to miss,easy to blame? Peacelines,interfaces and political deaths in Belfast during the Troubles

As Northern Ireland moves further from the period of conflict known as the ‘Troubles’, attention has increasingly focussed on the social and material vestiges of that conflict; Northern Ireland is still a deeply-divided society in terms of residential segregation between Catholic nationalists and Protestant unionists, and urban areas are still, indeed increasingly, characterised by large defensive walls, known as ‘peacelines’, which demark many of the dividing lines between the two communities. In recent years a body of literature has emerged which has highlighted the spatial association between patterns of conflict fatality and proximity to peacelines. This paper assesses that relationship, arguing that previous analyses have failed to fully take account of the ethnic complexity of inner-city Belfast in their calculations. When this is considered, patterns of fatality were more intense within the cores or ‘sanctuaries’ of highly segregated Catholic and Protestant communities rather than at the fracture zones or ‘interfaces’ between them where peacelines have always been constructed. Using census data at a high spatial resolution, this paper also provides the first attempt to provide a definition of the ‘interface’ in clear geographic terms, a spatial concept that has hitherto appeared amorphous in academic studies and media coverage of Belfast during and since the Troubles. In doing so it embodies both the material and demographic aspects of social division in Northern Ireland, and suggests an urgent need to reappraise the true role of these forms of social boundary in influencing patterns of violent conflict.     

A REGIONAL CONSUMER DEMAND MODEL FOR NEW ZEALAND*

ABSTRACT. This paper discusses the formulation and estimation of sets of demand systems for six New Zealand regions. The chosen model is based on the Linear Expenditure System, constrained in various ways to take account of interregional differences in consumer behaviour. Our results suggest that income and price elasticities of demand vary significantly between regions, suggesting that regional employment and output patterns are likely to differ in their responses to changes in aggregate demand.     

MILL PRICING AND SPATIAL PRICE DISCRIMINATION MONOPOLY PERFORMANCE AND LOCATION WITH SPATIAL RETAIL MARKETS*

ABSTRACT. Most of the monopoly spatial price discrimination literature explicitly assumes uniform population density over space. It also implicitly assumes that firms (plants) are spatially isolated from each other with production and retail points that coincide in location. While departures from these assumptions have been explored separately in the literature, it remains to examine performance and location when these assumptions are relaxed simultaneously. What emerges in this paper is a model where density functions approximate a pair of cities isolated from other cities. Each city has its own retail market, while the location of a single production or wholesale point is determined by characteristics of the two markets. Comparisons of mill pricing and spatial price discrimination found in the spatial monopoly literature can be interpreted as special cases of the more general framework provided here.     

福建省城镇流动人口的空间分异格局——基于六普数据的分析

文章基于第六次人口普查数据,运用数理统计、空间自相关和GIS等方法,分析了福建省城镇流动人口的空间分异格局。研究发现,福建省城镇流动人口在沿海多而密集、以区外流动为主,开放性和活跃性明显,而在内陆则少而稀疏、以区内流动为主,封闭性和粘滞性突出,但沿海和内陆均存在内部异质性;大城市流动人口密集且来源地广泛、对人口城镇化影响大,中等城市流动人口规模较小,小城镇对区内流动人口有一定吸纳能力。文章还探讨了城镇流动人口空间分异特征的驱动机制、对区域社会经济发展和城镇化的影响,并提出相关政策建议。     

基于新地理信息技术的南京市游客流动性空间特征研究

利用新地理信息技术,采集500个游客GPS地理标记照片,运用GIS空间分析方法,分析游客在南京城市内部及其与长三角其它城市空间流动特性,并提炼游客空间行为一般模式。发现:①南京城市内部旅游流在主城区集聚,整体上呈现中心城区向四周扩散的趋势;且在空间形态上形成小型化、斑块化的布局特征。②南京与长三角周边城市的线形路线以点-点模式为主导,地域模式以便利的同城市中心流动为多数,其旅游流流动模式与已有典型模式基本吻合,同时长三角地区旅游流呈现等级扩散特征。     

Dividing Societies: The Socio‐Political Spatial Implications of Restructuring in Australia

This paper reviews trends over the last two to three decades in the socio‐economic divisions in Australia, focusing on their spatial dimensions. It provides empirical evidence that our society is dividing on multiple dimensions – including shifts in industry and occupational structure, income distribution, the incidence of poverty. And it demonstrates that the differentiations across space in socio‐economic phenomena also have complex multiple dimensions, which are explained inadequately by a ‘city/bush’ dichotomy popularly espoused by politicians and reported in the media. Processes of globalisation, economic restructuring and employment shifts, and changing patterns of population movement are combining to create stark differentials between places both within the major cities as well as in regional Australia. As demonstrated by the recent One Nation phenomenon, voter backlash is strong, and it too has specific spatial characteristics.     

The Effect of Spatial Stimuli on the Estimation of Cognitive Maps

Hand-drawn and multidimensionally scaled maps of cities in the United States are compared with respect to their congruence with physical maps of the corresponding cities and with respect to subject's evaluations of their similarity to physical maps. The cities chosen are systematically varied to determine the effect of different spatial patterns on the subjects' performance. Hand-drawn maps are shown to be more like physical maps. Subjects also rate their drawn maps as being more like actual maps than multidimensionally scaled maps. Changes with respect to the spatial pattern of stimuli are apparent.