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Portuguese Economic Journal - 相似文献
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Inês C. RosaJoana L. Pereira João GomesPedro M. Saraiva Fernando GonçalvesRaquel Costa 《Ecological Economics》2011,70(10):1805-1813
While the biofouler Corbicula fluminea (Müller, 1774) is known to cause great economic losses in North America, studies reporting the problem in Europe are much scarcer. This paper explores the industrial effects of the species in Portugal, the gateway by which the bivalve entered Europe around 30 years ago. National waterworks, major power stations, cement plants, pulp and paper mills and irrigation systems were surveyed. The industrial impacts of the pest were shown to remain relatively mild; irrigation systems are those that seem to be facing more significant economic losses due to infestation. Possible reasons for the apparent discrepancy between this result and the species dispersal in natural ecosystems are discussed, and recommendations on adequate responses to the latent threat are provided. This study may assist the implementation of integrated pest management policies in countries at risk of invasion or recently invaded, and contribute to an understanding of the species’ progression in industrial environments. 相似文献
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Cristiano Antonelli Giuseppe Scellato 《Economics of Innovation and New Technology》2013,22(3):256-280
This paper contributes to the analysis of the persistence of innovation activities, as measured by total factor productivity (TFP), and explores its internal and external determinants stressing its path-dependent characteristics. The external conditions, namely the quality of local knowledge pools and the strength of the Schumpeterian rivalry, along with the internal conditions (the actual levels of dynamic capabilities, as proxied by wage levels and firm size) exert a specific and localised effect upon the persistent introduction of innovations. A multiple transition probability matrixes (MTPMs) approach has been implemented to capture the contingent effects of external factors on long-term innovation persistence. The empirical analysis of the dynamics of firm-level TFP for a sample of approximately 7000 Italian manufacturing companies observed during the years 1996–2005 is based on both the comparison of different transition probability matrixes and on dynamic discrete choice panel data models. The evidence provided by the test of MTPMs in sub-periods suggests that innovation persistence is path-dependent, as opposed to past-dependent. 相似文献
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António Aguiar Costa Amílcar Arantes Luís Valadares Tavares 《Journal of Purchasing & Supply Management》2013,19(4):238-246
This paper analyses public e-procurement implementation and emphasizes its main difficulties and impacts in relation to the type of public organizations. The primary impacts and changes in the Portuguese public sector are analyzed within the new legal framework, which adopts mandatory e-procurement for any open, restricted or negotiated procedure. In this sense, two surveys carried out in consecutive years were conducted to assess the implementation difficulties and impact of e-procurement in the Portuguese public sector.The major value of this research is that it presents and discusses, for the first time, evidences about difficulties and impacts on the mandatory adoption of public e-procurement, based on the case of Portugal. The results show that the entities’ administrative level influences the e-procurement implementation, which is influenced by the innovation adoption process. 相似文献
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Samuel R. Dastrup Joshua Graff Zivin Dora L. Costa Matthew E. Kahn 《European Economic Review》2012,56(5):961-973
This study uses a large sample of homes in the San Diego area and Sacramento, California area to provide some of the first capitalization estimates of the sales value of homes with solar panels relative to comparable homes without solar panels. Although the residential solar home market continues to grow, there is little direct evidence on the market capitalization effect. Using both hedonics and a repeat sales index approach we find that solar panels are capitalized at roughly a 3.5% premium. This premium is larger in communities with a greater share of college graduates and of registered Prius hybrid vehicles. 相似文献
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In this paper we examine the effects of trade liberalisation on inequality in the small developing country of Nepal. We use a Computable General Equilibrium approach applied to a newly developed social accounting matrix, simulating three liberalisation scenarios: (i) import liberalisation; (ii) export liberalisation; and (iii) import and export liberalisations implemented together under different exchange rate regimes. Outcomes reveal that industry reallocation following liberalisation does not respond to classical trade theory expectations about factor intensity and abundance. On the distributive side, liberalisation seems to increase the high-skilled/low-skilled gap and favour rich households relatively more. However, since under fixed exchange rate also the two poorest household groups increase their income levels, liberalisation may also expected to be beneficial for poverty alleviation. 相似文献
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This article anatomizes the ‘productivity race’ between Nazi Germany and the US over the period from the Great Depression to the Second World War in the metalworking industry. We present novel data that allow us to account for both the quantity of installed machine tools and their technological type. Hitherto, comparison of productive technologies has been limited to case studies and well‐worn narratives about US mass production and European‐style flexible specialization. Our data show that the two countries in fact employed similar types of machines combined in different ratios. Furthermore, neither country was locked in a rigid technological paradigm. By 1945 Germany had converged on the US both in terms of capital‐intensity and the specific technologies employed. Capital investment made a greater contribution to output growth in Germany, whereas US growth was capital‐saving. Total factor productivity growth made a substantial contribution to the armaments boom in both countries. But it was US industry, spared the war's most disruptive effects, that was in a position to take fullest advantage of the opportunities for wartime productivity growth. This adds a new element to familiar explanations for Germany's rapid catch‐up after 1945. 相似文献
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