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1.
We propose a framework that specifies the process of economicdevelopment as an evolutionary branching process of productinnovations. Each product innovation provides a growth opportunityfor an existing firm or a new firm, and for an existing cityor a new city. One can then obtain both firm size and city sizedistributions as two aggregates resulting from a single evolutionaryprocess. Gains from variety at the firm level (economies ofscope) and the urban level (Jacobs externalities) provide thecentral feedback mechanism in economic development generatingstrong path dependencies in the spatial concentration of industriesand the specialization of cities. Gains from size are also expected,yet these are ultimately bounded by increasing wages. The contributionof our framework lies in providing a micro-foundation of economicgeography in terms of the interplay between industrial dynamicsand urban growth. The framework is sufficiently general to investigatesystematically a number of stylized facts in economic geography,while at the same time it is sufficiently flexible to be extendedsuch as to become applicable in more specific micro-contexts.A number of extensions related to the concepts of knowledgespillover and lock-in, are also discussed.  相似文献   

2.
In a talk given at Zurich in the late 1940s, Hermann Weyl discussed Ferdinand Gonseth's dialectical epistemology and considered it as being restricted too strictly to aspects of historical change. His experiences with post-Kantian dialectical philosophy, in particular Johann Gottlieb Fichte's derivation of the concept of space and matter, had been a stronger dialectical background for his own 1918 studies in purely infinitesimal geometry and the early geometrically unified field theory of matter (extending the Mie-Hilbert program). Although now Weyl distantiated himself from the speculative features of his youthful philosophizing and in particular from his earlier enthusiasm for Fichte, he again had deep doubts as to the cultural foundations of modern mathematical sciences and its role in material culture of high modernity. For Weyl, philosophical «reflection» was a cultural necessity he now turned towards Karl Jaspers' and Martin Heidegger's existentialism to find deeper grounds, similar to his turn towards Fichte's philosophy after World War I. The discussion in the late 1940s can be read as a kind of post-World-War-II «Nachtrag» to Weyl's more widely known philosophical comments on mathematics and the natural sciences published in the middle of the 1920s.  相似文献   

3.
This article discusses the application of new technologies, software coding and computer analysis in the social sciences and humanities, mainly in the field of economic history. In the last two decades, the use of new computer technologies among historians to develop theories and solve questions has fostered a vibrant historiographical debate. However, these new digital tools have largely been used as an end in themselves, rather than as a means to develop hypotheses and answer questions. This has prevented researchers from fully exploiting such technologies in their field. In this article, I discuss how I designed a new multi-relational database using the “Access” package and SQL language to test the “industrious revolution” hypothesis and present the “vicarious consumption” theory as an alternative model for analyzing the eighteenth-century circulation of Chinese goods in the Western Mediterranean region. It presents the cross-referencing method I used to analyze the historical information I collected, mainly from probate inventories and trade records. This method makes it possible to navigate through the data in a way that goes beyond the traditional use of “excel” tables.  相似文献   

4.
We use the case of Chile to analyze the effectiveness of a spatially blind employment relief program (hereafter referred to as the LPE program) established by the Chilean government and implemented during the COVID-19 pandemic. Chile is an interesting case because on the one hand its nonpharmaceutical interventions were spatially driven by health indicators based on small geographical areas; hence, producing sizeable regional and temporal variation of the local conditions induced by the COVID-19 pandemic. On the other hand, the LPE program was designed and implemented nationally without distinction of local labor market or pandemic conditions, and each firm could decide whether to enroll in the program. By exploiting the spatial-temporal variation of exogenously imposed lockdowns and using a difference-in-differences panel data framework, we find that the LPE program was only effective for a group of regions in the country but, more importantly, that the LPE program was less effective during lockdowns. Moreover, the requirements of the LPE program were vague and did not target specific populations or entities. Consequently, our results suggest that women, informal and small firm workers, and most economic sectors throughout the country were less able to take advantage of the benefits of this program.  相似文献   

5.
The State Archive of the Russian Federation (GARF) contains a corpus of around one hundred letters sent by Élisée Reclus to Pëtr Kropotkin between 1882 and 1905. The correspondence is mainly concerned with their geographical works, notably the collaboration of Kropotkin with the Nouvelle Géographie Universelle (1876-1894) and the Brussels edition of Kropotkin’s Orographie de la Sibérie (1904), edited by Reclus. In this paper, we deal first with the importance of this source: it is an example of the material work of a network of geographers who were at the same time the founders of the international anarchist movement. We suggest the correspondence falls into two parts: the first period (1882-1886) when Reclus was in exile in Switzerland after the Paris Commune of 1871, and Kropotkin was in prison in France; and the second period (1888-1905) when the two anarchist geographers discuss the role of geographical education, historical geography in Europe and its part in the globalisation of their era. The archive also contains significant evidence of their relationships with British geography: Kropotkin lived in London and joined the Royal Geographical Society and was on familiar terms with leading Fellows, such as John Scott Keltie and Halford Mackinder. The paper addresses the significance of the correspondence for understanding the relationships between geography, politics and public education, and the role of these heterodox geographers in the construction of geographical knowledge. The paper is accompanied by the publication, for the first time, of an edited selection of the letters.  相似文献   

6.
Resource towns often exist on a knife‐edge, largely depending upon global demand for their resource/s and, at the same time, playing a critical role in the development of a nation. The transition from single resource towns to diversified economies has been modelled on several occasions, but their application to other resource locales is difficult given the unique interplay of geographic, political, social, and economic factors. Nonetheless, Innis' Canadian staples theory may explain the political motivations of resource extraction and exportation, not least in relation to the Western Australia Goldfields. This paper seeks to explore the theory's potential in this context by examining the implications of high labour mobility. It employs a two‐step process using, first, a social network analysis to map the entire Australian labour commuting network and, second, a regression analysis of commuting, regional wealth, and population size against population change. While the Goldfields historically grew in line with processes described by Innis' theory, contemporary high labour mobility has created a variegated landscape of different development dynamics and trajectories. This finding carries implications for network patterns of residence and work. Labour acts to extend the distribution of wealth by sending incomes to the metropolitan core and to amenity‐rich regional towns across the State and nation. In such light, regional development scholars must view the resource town in its broader urban system of distinct but interlocked, and sometimes overlapping, activity nodes.  相似文献   

7.
哈尔滨市创建世界冰雪旅游名城对策研究   总被引:1,自引:0,他引:1  
徐淑梅 《旅游科学》2008,22(1):75-78
建设世界冰雪旅游名城已成为新世纪初哈尔滨市实现跨越式发展的一项重要战略举措,如何发展冰雪旅游,做好冰雪旅游产业文章,真正将哈尔滨建设成为国际知名的冰雪旅游城市,是哈尔滨面临的重大课题。本文提出按国际水准进行规划、构建“政府主导社会参与市场运作”发展格局、走“提质增效”的经营道路、推进产品创新、制定有效的市场营销策略、营造世界冰雪旅游名城环境氛围、提升旅游服务、重视人才培养实施人才兴旅战略等相应对策。  相似文献   

8.
20世纪 90年代以来 ,江泽民根据国际形势的新变化 ,敏锐洞察科学技术在当代综合国力竞争中的决定性作用 ,科学分析两极格局解体后的新形势 ,指明现代国际间的竞争说到底是综合国力的竞争 ,关键是科学技术的竞争 ;他根据世界军事发展新形势 ,适时提出“两个转变” ,把抢占军事制高点作为我军质量建设的重要战略目标 ;江泽民高度重视国防高科技创新 ,强调要尽快掌握维护国家主权和安全所需要的新的“杀手锏” ;他阐明科技强军关键在人才 ,提出建设一支富有创新能力的高素质人才队伍  相似文献   

9.
The Middle Bronze Age II is a period during which there exists a contemporaneous usage of arsenic copper and tin bronze for metal weaponry production. In order to learn more about the alloys used in this period, the blades and rivets from 65 daggers of two significantly different types, which were discovered at the Rishon LeZion (RL) cemetery, Israel, were tested by the non‐destructive method of X‐ray fluorescence (XRF). The results reveal new knowledge of the alloys selected for dagger and rivet production, both of which represent fine examples of the Middle Bronze Age II Southern Levant in metal industry.  相似文献   

10.
隋唐大运河是一类典型的线性文化遗产。它贯通南北,通航长达八朝,漕运惠及全国,是中国历史上最为高效和最有影响力的南北经济文化资源交互传播线路。对于它的保护,首先必须开展资源调查,摸清家底,然后以点带面,实施重点保护。同时,还要分析问题,统筹兼顾,整体保护。  相似文献   

11.
Human geography students face changing qualification requirements due to a shift towards new topics, educational tasks and professional options regarding issues of spatial development. This ‘practical turn’ raises the importance of inter- and transdisciplinary work, management and capability building skills, with case study projects and student-centred learning providing suitable approaches. This paper introduces the example of the teaching and research project ‘Leben 2014’: Students, faculty and local actors have collectively worked out future development scenarios for a rural region in Austria, actually creating impact. The project may thus serve as a model that inspires similar schemes in other countries.  相似文献   

12.
Salt is an essential mineral in the human diet, and ancient peoples obtained salt either directly from rock salt, from salt lakes, or by concentrating saline waters from salt springs or seawater in pottery vessels. However, because sodium chloride, the major component of salt, is soluble in water, it has been thought unlikely that any trace of salt would remain in the pottery after a long period of time. A new methodology for retrieval of water-insoluble (retainable) chloride ion trapped within a pottery matrix is presented as a method for detecting previous use of the pottery for salt making. Simulated salt-making pottery was used to make salt by repeatedly boiling seawater over a fire. After chloride had been extracted with distilled water, to mimic the removal of chloride by natural waters such as rainwater and groundwater, an aqueous ammonium fluoride solution was shown to be capable of extracting chloride ions remaining in the pottery. A chloride-selective electrode was used to quantify the amount of extracted chloride in the presence of fluoride. This method was then successfully applied to excavated Japanese pottery vessels suspected of having been used for making salt. Identification of retainable chloride in pottery can offer insights into salt trading networks, which reflect the growth and affluence of an ancient society.  相似文献   

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