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951.
Alejandro Gaviria † 《Economics of Innovation and New Technology》2013,22(1):53-70
In this paper we use world cycling records to study the pattern of technological development of the track bicycle. We find that there is a strong evidence of ‘contagious’ effects among cycling records which in turn provides indirect evidence of ‘contagious’ effects among technological innovations. Interestingly, the ‘contagiousness’ of records is not a salient characteristic of track and field competitions where, arguably, technology plays a smaller role. 相似文献
952.
Measures of multifactor productivity growth in natural resource industries are misleading without accounting for the effects on the environment. This paper introduces environmental effects into an output-oriented Malmquist index of multifactor productivity growth in order to evaluate growth in productivity and technical efficiency for Korean purse seine vessels fishing for tuna in the Western and Central Pacific Ocean. 相似文献
953.
Rinaldo Evangelista Valeria Mastrostefano 《Economics of Innovation and New Technology》2013,22(3):247-270
This paper aims at providing a comprehensive empirical appraisal of the nature, extent and sources of variety in innovation in industry across Europe. The results presented in the empirical section of this paper are based on a unique database (SIEPI) containing data drawn by the second Community Innovation Survey (CIS2) for 10 countries, 22 manufacturing sectors and three firm-size classes. This database has allowed us to look beyond the sectoral aggregate statistics provided by Eurostat and explore in detail the differences in innovation processes both within and across European countries and manufacturing industries. Further, the SIEPI database has been used to identify the determinants of the variety in innovation across Europe. In particular, the analysis focuses on the relative importance of sector-specific, context-specific and firm-size factors in driving firms’ innovative behaviours and performances. 相似文献
954.
J. M. Plehn-Dujowich 《Economics of Innovation and New Technology》2013,22(3):205-223
We propose a general theory of innovation that illustrates the relative benefits of performing process versus product R&D when firm size is endogenous. A firm's size, scope, and R&D portfolio are shown to reflect the same underlying characteristic of the firm, namely manufacturing efficiency. We demonstrate that efficient firms become larger, have greater scope, and perform more of both process and product R&D. In light of decreasing returns to R&D, this implies small firms obtain more product innovations per dollar of R&D than large firms, which is consistent with evidence we present that small firms are more innovative than large firms as they obtain more patent counts and citations per dollar of R&D. 相似文献
955.
One of the key features of our economies consists of the coexistence of different technologies supplying similar products and services. We often observe that an old technology is improved when a new one appears; behind this process of improvement often lies an intentional research activity. There thus begins a competition between the two technologies whose performances are improved via R&D. We focus our attention on this competition process and supply a formal model, based on the optimization of R&D expenditure of both technologies, which can describe the dynamics of the delayed overtaking of the new technology over the old one. 相似文献
956.
The impact of technological change upon gross investment has been relatively ignored. Building upon the foundations of the analysis of technological diffusion, an empirical model of gross investment is constructed that takes due account of technological change. This model is then tested upon a panel data set covering 185 UK firms over the period from 1984 to 1992. The results support the hypothesis that there are significant relationships of the expected signs between firm level gross investment, indicators of technological opportunity; the price of the capital goods that embody new technology, and firm and industry characteristics. There is also evidence of lagged adjustment effects in the investment process. 相似文献
957.
The Earth system is a complex adaptive system, characterised by non-linear change and with significant capacity for surprise. In times of systemic crisis, such as dangerous anthropogenic climate change, perverse resilience (for example the structural power of fossil fuel interests in the global economy) can threaten overall Earth system stability. Critical political economic analysis recognises climate change as a threat with significant political economic characteristics and implications. However, key dimensions of climate change as a globally coherent phenomenon, including the important implications of Earth system dynamism and non-linear change, can remain unrecognised, mischaracterised or underestimated. In contrast, resilience approaches describe social-ecological systems but neglect the significance of norms and power relations in human societies. This article builds theory by linking key concepts – hegemony and resilience – from neo-Gramscian political economic analysis and resilience approaches to social-ecological systems. Our objective is to generate a new conceptual framework to improve understanding of the role of politics in social-ecological systems. We use climate change and its mitigation to demonstrate the new framework's potential. 相似文献
958.
从一般无形资产的研究理论出发,结合建筑施工企业的行业特点对建筑施工企业的主要无形资产进行归类,提出关于建筑施工企业无形资产与核心竞争力的关系,阐述各类无形资产的价值变动规律,为建筑施工企业提供一个更广阔的视野进行管理决策。 相似文献
959.
960.
Melissa Weber Mark Groulx Christopher J. Lemieux Daniel Scott Jackie Dawson 《Journal of Sustainable Tourism》2013,21(9):1318-1337
AbstractNational parks in Canada operate under the dual mandate of conservation and visitor use, which involves balancing ecological integrity and nature-based tourism activities. Climate-induced environmental change may increase the existing tension between conservation and visitor use as major tourism resources located in protected areas (PAs) are projected to undergo large-scale changes. This study draws upon the behavioural approach, scenario planning, and landscape visualizations to examine the relationship between climate change impacts, visitor perceptions, and visitor experience management at the Athabasca Glacier in Jasper National Park, Canada. Four tourism development scenarios defined by two management drivers (ecological integrity and visitor demand) with corresponding storylines and visualizations were developed for 2050. The visualized scenarios were presented to visitors (n?=?304) in a survey to understand potential implications on visitor satisfaction. The results suggest that park managers need to find a balance between ecological integrity and visitor use in a way that ensures commercialized tourism development is limited, educational material is prioritized, and ecological integrity is maintained. While understanding the behaviour of future tourists is complex, it is a critical component of climate change adaptation planning and decision-making processes that needs to be prioritized by policymakers and PAs managers. 相似文献