EMPIRICAL POLYCENTRICITY: THE COMPLEX RELATIONSHIP BETWEEN EMPLOYMENT CENTERS

Our paper empirically demonstrates that employment subcenters in large urban areas have important economic relationships with each other, and not solely with the central business district (CBD). Using data from Houston, Texas, we estimate polycentric density functions and show that “total” gradients differ from gradients using only own‐center coefficients. We model asymmetry by showing density is very different for centers with overlapping areas of influence. We conclude that subcenters have important yet heterogeneous linkages to each other in addition to the CBD, and that therefore the polycentric city is more complex than simply having additional centers mimicking the CBD.     

THE RELATIONSHIP BETWEEN THE ESTABLISHMENT AGE DISTRIBUTION AND URBAN GROWTH*

ABSTRACT This paper explores the relationship between urban growth and establishment‐level dynamics through geographic variations in the establishment age distribution. Using administrative microdata, I find that faster growing cities have higher rates of entry and exit, and younger establishments, on average. The resulting differences in the age distribution account for 38 percent of the variation in MSA employment growth, leaving the majority due to differences among establishments of the same age. In particular, entry and the growth and survival of young establishments (aged five years or less) account for the majority of the variation in MSA growth.     

MARKET DEFINITION AND ASSESSING THE COMPETITIVE RELATIONSHIP BETWEEN RAIL AND TRUCK TRANSPORTATION*

ABSTRACT. In this paper we develop a method for establishing market definition in studies of intermodal competition. We employ the proposed method in a transportation model that yields estimates of the substitutability between truck and rail services for the transport of fresh fruits and vegetables. The model includes the produce being shipped as an input into the production of delivered produce. Our results demonstrate that fairly disaggregate market definitions are required to characterize adequately the intermodal substitution possibilities of interest. While disaggregate data are required for econometric estimation of the cost function, it is essential that elasticities be calculated at a disaggregate level as well. The elasticities reported are larger than reported in earlier work and provide strong evidence of vigorous intermodal competition in produce transportation markets.     

基于手机数据的北京城市女性职住关系研究

自20世纪70年代以来，女性地理学的研究成为城市地理学关注的热点。本文基于2015年12月1日工作日涵盖所有交通出行方式的手机数据，采用核密度分析、回转半径、网络分析等方法，分别从市域、中心城区、就业集聚区三个空间尺度分析北京城市女性职住关系特征。研究发现：尺度影响女性职住关系特征，大尺度空间范围内的女性职住关系特征不显著；与工作在中心城区的女性相比，郊区女性的职住地联系较紧密；公共服务设施较为完善且以服务业为主导的工作地对女性就业者的吸引力更大。从工作地的角度探究女性职住关系特征，丰富了城市社会地理学和女性主义地理学的研究视角，其研究结果为人性化城市空间建构和设施配置提供理论依据。     

资源禀赋与区域农业剩余劳动力转移相关研究——以山东省为例

本文从区域经济学角度,以山东省为例,探讨了资源禀赋条件对农业剩余劳动力转移区域结构、转移强度、转移类型的影响,定量计算出不同资源对区域农业剩余劳动力转移压力指数,得出了相关结论。     

THE RELATIONSHIP BETWEEN LITHOLOGY,FLAKING PROPERTIES AND ARTEFACT MANUFACTURE FOR AUSTRALIAN SILCRETES*

Mechanical properties of Australian silcrete strongly influenced raw material selection and artefact manufacture. Microcrystalline silcrete, with high compressive and tensile strength, is suitable for blade tools requiring fine retouch. Fine‐grained silcrete (high compressive strength but lower tensile strength) was often used for blade‐based implements, but is more susceptible to edge fracturing. Medium‐grained silcrete has poor flaking properties (low compressive and tensile strength) and was often used for flake manufacture. Thus material determinism can explain much of the variability in silcrete artefact morphology and assemblage composition. Silcrete compressive strength is positively correlated with percentage of microcrystalline matrix and negatively correlated with average grain size, so hand lens examination of a silcrete sample can give a good indication of its likely flaking quality.     

THE RELATIONSHIP BETWEEN CAIRNS AND SETTLEMENT SITES

Summary. This article discusses the problem of how to relate a special grave construction to a particular settlement site. An example from the West Swedish Bronze Age is presented to pinpoint the difficulties of the chronological criteria and the drawbacks of using 'nearness' as a criterion.
The idea presented is that a relationship between a grave monument and a settlement site may be reflected in areas where the building material, the stones, were picked up. Such areas can be demonstrated in a test example from West Sweden, which showed that, under special circumstances, such a link may be valuable for solving the problem of how to relate a cairn to a settlement site.     

国内外城市居民职住空间关系研究进展和展望

城市居民职住空间关系是指城市居民居住地和工作地之间的社会空间关系,是城市空间结构的重要研究内容。体制转型时期中国城市居民职住空间关系正在经历着翻天覆地的变化。本文主要从职住空间关系研究学派、职住空间平衡和城市通勤、居住选择和居住空间分异等方面对国内外相关研究进行述评,认为国内相关研究应注重社会调查,加强个体层面的研究,从体制转型和个体社会经济特征等角度寻求城市居民职住空间关系及其演化的形成机制,并注重特殊群体,如外来人口、城市贫困人口和原单位制社区居民等社会群体的职住空间关系和社会空间后果研究。     

THE RELATIONSHIP BETWEEN THE LOCATION OF SERVICES AND RURAL SETTLEMENT

Soviet planners are advised to consider the linkage between rural settlement patterns and the provision of services, an issue that is assuming particular significance in connection with the present development program in the Nonchernozem Zone of the RSFSR. The number of service establishments per 1,000 population is not considered a useful indicator because it tends to be high in areas with widely dispersed settlement in small inhabited places, and yet does not reflect a high level of services because of the small size of the establishments. It is desirable to cluster sets of services in central places; the presence of a single kind of service (store, school, etc.) in a small place is found tantamount to having no service whatever. Adequate provision of services is found to reduce, or even reverse, rural out-migration.     

THE COMPLEMENTARITY BETWEEN CITIES AND SKILLS*

ABSTRACT There is a strong connection between per‐worker productivity and metropolitan area population, which is commonly interpreted as evidence for the existence of agglomeration economies. This correlation is particularly strong in cities with higher levels of skill and virtually nonexistent in less skilled metropolitan areas. This fact is particularly compatible with the view that urban density is important because proximity spreads knowledge, which either makes workers more skilled or entrepreneurs more productive. Bigger cities certainly attract more skilled workers, and there is some evidence suggesting that human capital accumulates more quickly in urban areas.