EMPLOYMENT CYCLES AND PROCESS INNOVATION IN REGIONAL STRUCTURAL CHANGE*

Regional employment cycles, the demand for skilled and unskilled labor, and process innovations are analyzed in the context of an industry product cycle. Employment fluctuations caused by endogenous technological change lead to spatial decentralization of production facilities through capital relocation and spatial divisions of labor. A capital investment profile suggested by the product cycle scenario is related to employment cycles. A price system for output is outlined in terms of wages and profits over the product cycle.     

制度变迁与中国城市的发展及空间结构的历史演变

我国的城市发展水平同经济发展水平的偏离,说明对城市发展及其空间结构演变分析不能仅局限在物质经济领域,需要我们寻求影响城市发展及其空间结构变化的新因素一制度因素,把制度作为影响城市发展及其空间结构的一个主要的变量,来对此加以解释。为此,本首先构建了“制度变迁一城市发展变化”的理论框架,然后用该理论从宏观和微观两个方面来检验1949-1998年间制度变迁对城市发展及其空间结构的影响。与西方国家的以市场经济为主要动力驱动型的城市发展模式不同,中国城市的发展及其空间结构的演变在很大程度上是制度变迁而诱致的结果。但不同的制度对城市数量增长、组织体系及空间布局和对城市空间结构演变的作用力度又不尽相同。改革开放后,由于制度变迁带来的激励作用,中国城市获得了快速发展,城市空间结构快速变化。但与此同时,中国城市化的发展水平与相同发展条件下的世界城市化水平的差距却在拉大。而且随着市场经济体制的逐步完善,影响城市增长及空间结构的演变力量的因素越来越趋于分散化,制度变迁对城市发展所带来的激励作用正在弱化。为适应新世纪我国城市发展的战略目标,需要进行体制创新,为中国城市的发展及其空间结构的演变提供新的制度支持。     

在转型中留下城市文明的印记

<正>《世界遗产》:在我国这样一个悠久的文明古国和短暂的工业化国家里,工业遗产似乎是一个长期被忽视的遗产类别。忽视的原因除了历史长短之外,还有什么?张廷皓:中国研究工业遗产的人并不多,工业遗产也是近些年才提到日程上。我觉得它不是被忽视的问题,它是工业化发展的必然。落后的产能是要淘汰的,严重影响环境的产业也是要淘汰的,还有大量浪费资源的,淘汰是工业化发展过程中的一个必然,并不是说我们忽视它。     

LANDSCAPE CHANGE IN THE LAKE SIMCOE-COUCHICHING BASIN, 1800–1983

Census data and Trimble's erosive land use (ELU) index are used to document changes in agricultural land use and potential erosion in the Lake Simcoe—Couchiching Basin during the past two centuries. The ELU index is represented by the cover-management factor in the universal soil loss equation and takes values between 0 (no erosion) and 1.0 (accelerated erosion). Basin-wide farmland ELU scores increased prior to 1901 due to intensification of agriculture, fell between 1911 and 1961 as yields and areas under grass increased, and then increased again from 1961 onward due to expansion in corn hectarage. The 0.152 index computed in 1981 is almost as large as the largest index (0.154)computed in 1891 and illustrates the huge environmental changes in the basin since early settlement without the beginnings of a permanent and more viable system of land use. Les changements d'utilisation des sols survenus au cours des deux derniers siècles dans le bassin du Lac Simco-Couchiching de même que I'érodibilité de ces sols, font I'objet d'une évaluation à I'aide des données de re-censements et de I'indice d'érosion particulier aux dif-férentes utilisation du sol (indice de Trimble). Le facteur de gestion de la couverture dans l'équation universelle de la partie de sol figure dans cet indice dont la valeur se range entre 0 (absence d'érosion) et 1.0 (érosion en accélération). Les scores pour les terres agricoles à I'éhelle du bassin ont augmenté avant 1901 quand l'agriculture s'est intensifiée, puis ont chuté entre 1911 et 1961 à mesure que les rendements et les superficies herbacées augmentaient, et enfin ont de nouveau re-monté depuis 1961 à la suite de l'expansion des superficies plantées en maïs. L'indice obtenu pour 1981 (0.1521 est presque aussi élevé que I'indice le plus fort atteinten 1891 (0.154). ll démontre les changements considérables survenus dans I'environnement du bassin depuis le tout début de son peuplement, alors qu'aucun système d'utilisation des sols permanent et plus viable n'a encore pu èmerger.     

CHALLENGES IN APPROACHES TO SKELETAL STATURE ESTIMATION: AN EXAMPLE FROM PREHISTORIC EASTERN MISSISSIPPI AND WESTERN ALABAMA

Abstract

Although stature is used widely as a bioarchaeological health indicator, its determination and subsequent interpretation are not always straightforward. A study of 77 individuals from eight prehistoric populations from the Tennessee-Tombigbee Waterway illustrates this issue. Application of three common stature estimation formulae to five Middle/Late Woodland and four Mississippian groups strongly suggests that use of partial versus whole bone, choice of element, and stature estimation method can create disparate patterns in health interpretation, not only for the direction of differences but particularly regarding the degree of differences among groups.     

STRUCTURAL DIMENSIONS IN THE GEOGRAPHY OF LOCATIONAL CONFLICTS

L ocational c onflict is a frequent by-product of efforts to change the physical structure of man-made environments. Within the geography discipline, theoretical and empirical interests in the conflict basis of public and private decisions on the use of land were stimulated in the early 1970s by the work of Julian Wolpert and his associates.¹ The resolution of conflicts over the locations of specific activities is seen as an important means of allocating benefits among locations² and has led to considerable variations in the distribution of necessary services and amenities among residents of the city.³ Indeed, irrespective of overt evidences of conflict occurrence, David Harvey has characterized the land-use pattern itself as an important indicator of the socio-political rules which direct urban development.⁴