Evolutionary diffusion: internal and external methods used to acquire encompassing,complementary, and incremental technological changes in the lithotripsy industry

This study links theories concerning methods that firms use to acquire technology with theories concerning types of technological change. We place particular emphasis on interorganizational relationships. We predict that firms will often acquire know-how needed for encompassing technological change through equity-based arrangements with other organizations, complementary technological changes through nonequity interorganizational arrangements, and incremental changes through internal R&D. Our theory draws on perspectives that emphasize the need to develop new competencies within a business organization and to protect the value of existing competencies. Our empirical analysis examines methods of technology acquisition that firms have used in the commercialization of medical lithotripters, which are devices that fragment stones in the kidney and gall bladder. The analysis contributes to a better understanding of how technology acquisition methods vary with the manner in which technological change relates to a firm's existing capabilities. The study also helps develop our understanding of the evolutionary processes by which capabilities diffuse through an industry. © 1998 John Wiley & Sons, Ltd.     

Resource recombinations in the firm: knowledge structures and the potential for schumpeterian innovation

Building on the resource-based view of the firm, this paper explores the notion of ‘resource recombinations’ within the firm. We suggest such recombinations can occur when competencies within the firm (which are interpreted as organized clusters of firm resources) either combine to synthesize novel competencies (synthesis-based recombinations) or experience a reconfiguration or relinking with other competencies (reconfiguration-based recombinations). Central to this paper is an examination of the antecedents necessary for such innovation to occur, and in particular the nature of knowledge in the firm. We argue that several characteristics of knowledge (tacitness, context specificity, dispersion) and its social organization (the way competencies come to be formed and institutionalized) will have important consequences on the likelihoods of resource recombinations. Our paper develops a model of resource recombination likelihoods and propositions. © 1998 John Wiley & Sons, Ltd.     

全球气候变化对海岛旅游地的影响与启示

气候既是海岛旅游业发展的自然条件,又是主要的资源,全球气候的异常变化影响海岛旅游资源的数量与质量、客流的空间与季节移动,并导致传统海岛旅游目的地的萎缩。全球气候变化对我国海岛旅游业的影响日益显著,必须及时调整海岛旅游发展的对策：大力发展生态旅游、可持续旅游;探究旅游者对气候变化的适应;改善海岛旅游目的地服务设施;重新进行海岛旅游规划;重视旅游主体人群的教育,以适应全球气候变化带来的巨大影响。     

Urban encroachment,forest regrowth and land-use institutions: Does zoning matter?

As concern grows regarding urban sprawl and forest and agricultural land preservation, the effectiveness of land-use policies in shaping land-use change warrants further study. We evaluate the impact of county-level zoning laws, the most predominant land use policy in the USA, and land rents on the relative amounts of forest, agricultural, and developed land, while controlling for demographic information and taxation rates. Over the past decades, southern Indiana has experienced forest regrowth on private lands, but this regrowth has declined in recent years with increased conversion of open space for urban residential development. We develop a model of land-use shares in 40 southern Indiana counties based on the net benefits to agriculture, forestland, and urban uses using a maximum likelihood estimation of a Dirichlet distribution. We find agricultural land rent and indicators of land productivity are the most important predictors of the proportion of agriculture and urban uses. Forest use is better explained by shifting regional economic structure and hilly terrain. Counties with a greater proportion of their work force in the service sectors have a greater proportion of land forested. Finally, to some extent zoning may protect agricultural land in the region, although land rents, land characteristics, and population are strong predictors of the ratio of agriculture to urban use.     

论低碳经济与转变土地利用方式

研究目的:研究中国宏观经济对碳排放的影响,探讨基于低碳经济的土地利用方式转变措施。研究方法:文献资料法,因果分析法。研究结果:(1)中国粗放的经济增长方式、外向型的经济结构导致了高额的碳排放;(2)发展低碳经济必须转变地方政府的发展观念,重新构建政绩考核体系,逐步建立区域人居环境评价和公民福利指数评价体系;(3)现实中受强大的土地经济属性冲击,加之缺乏健全的产权制度和行政管理体制制约,土地的公共资源属性被全面抛弃。研究结论:建立以提高居民福祉、保护资源与环境为前提的发展观念,强化土地资源的公共属性,实施土地利用的碳排放指标评价,是发展低碳经济的基本要求。     

Exploring the impact of R&D and climate change on agricultural productivity growth: the case of Western Australia*

This article empirically examines the impact of R&D and climate change on the Western Australian Agricultural sector using standard time series econometrics. Based on historical data for the period of 1977–2005, the empirical results show that both R&D and climate change matter for long‐run productivity growth. The long‐run elasticity of total factor productivity (TFP) with respect to R&D expenditure is 0.497, while that of climate change is 0.506. There is a unidirectional causality running from R&D expenditure to TFP growth in both the short run and long run. Further, the variance decomposition and impulse response function confirm that a significant portion of output and productivity growth beyond the sample period is explained by R&D expenditure. These results justify the increase in R&D investment in the deteriorating climatic condition in the agricultural sector to improve the long‐run prospects of productivity growth.     

Value creation in innovation ecosystems: how the structure of technological interdependence affects firm performance in new technology generations

The success of an innovating firm often depends on the efforts of other innovators in its environment. How do the challenges faced by external innovators affect the focal firm's outcomes? To address this question we first characterize the external environment according to the structure of interdependence. We follow the flow of inputs and outputs in the ecosystem to distinguish between upstream components that are bundled by the focal firm, and downstream complements that are bundled by the firm's customers. We hypothesize that the effects of external innovation challenges depend not only on their magnitude, but also on their location in the ecosystem relative to the focal firm. We identify a key asymmetry that results from the location of challenges relative to a focal firm—greater upstream innovation challenges in components enhance the benefits that accrue to technology leaders, while greater downstream innovation challenges in complements erode these benefits. We further propose that the effectiveness of vertical integration as a strategy to manage ecosystem interdependence increases over the course of the technology life cycle. We explore these arguments in the context of the global semiconductor lithography equipment industry from its emergence in 1962 to 2005 across nine distinct technology generations. We find strong empirical support for our framework. Copyright © 2009 John Wiley & Sons, Ltd.     

组织学习与连锁物流能力的关系研究

文章在回顾国内外有关文献的基础上,针对我国连锁物流的现状及存在的问题,提出了连锁物流能力、物流学习能力和组织学习的概念及构成要素、组织学习和连锁物流能力的作用关系概念模型,为连锁物流能力及物流服务质量的提升指明了方向,同时也为进一步在中国的实证研究奠定了基础。     

危机后期经济增长方式转变、指导思想与实践路径——必须依据马克思主义理论为指导克服危机

经济增长理论是社会经济增长的一种理论反映,源于斯密和李嘉图为代表的古典经济学,是二战后在发达国家广泛流行的经济理论。但是发达国家经济学家自身存在的认识论缺陷使其不可能科学完整的建立经济增长理论及模型,因此必须遵循马克思的方法论从理论为实际的反映入手建立科学模型,并指导中国经济结构以及产业结构的调整,特别是经济增长方式的转变实践中经济结构及产业结构的优化升级。     

夏比冲击功结合剪切面积评价管线钢管韧性的意义

描述了夏比冲击宏观断裂过程,并对管线钢管材料在冲击载荷作用下发生断裂全过程力的变化以及冲击吸收能量与宏观断口的关系进行分析,指出了夏比冲击功结合剪切面积评价管线钢管材料韧性的必要性。