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Nowadays, inter-firm linkages in the form of regional networks are seen as growth-promoting and important prerequisites for successful innovation activities in firms. Beginning with this hypothesis, the paper sets out to answer the question, whether manufacturing businesses with strong intraregional ties are more successful with respect to growth rates and innovative activities than those firms with little connection to their region. From a survey carried out in 10 European regions, the results verify that in spite of numerous network relationships on the national and international level small businesses are most likely to cooperate with others in their vicinity. In addition, the more knowledge-intensive innovation activities of businesses are, the more important is the relevance of spatial proximity in particular and networking in general. 相似文献
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Accounting for Air Pollution Emissions in Measures of State Manufacturing Productivity Growth 总被引:10,自引:0,他引:10
A Malmquist-Luenberger productivity index is employed to account for both marketed output and the output of pollution abatement activities of U.S. state manufacturing sectors for –1986. The index allows us to decompose the change in productivity into measures of change in efficiency and technical change. By accounting for the change in emissions, average annual productivity growth is 3.6 percent, whereas it is 1.7 percent when emissions are ignored. We also find adjusted productivity growth improved after 1977, and "Frost Belt" states with rapidly growing manufacturing sectors have significantly higher rates of productivity growth than "Sun Belt" states with slow growing manufacturing sectors. 相似文献
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Josefina Andersson Magnus Elfwendahl Gunvor Gustafson Britt-Marie Hägerman Rolf Lundqvist Ulrika Stenbäck Lönnquist Johanna Ulfsdotter Stig Welinder 《International Journal of Historical Archaeology》2011,15(1):10-29
Early gender archaeology formulated two statements: men are visible, women are invisible, and men work in hard materials,
women work in soft materials. We discuss these dichotomies in connection with nineteenth-century folklore and an excavated
eighteenth-century cottage at a summer-farm. We conclude that much of the gendered order-of-work tasks broke down in pragmatic
day-to-day life, especially by women crossing the gender border. However, social chaos was held at bay by ritual acts and
magic objects. 相似文献
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Mary Hindelang Rolf O. Peterson Ann L. Maclean 《International Journal of Osteoarchaeology》2002,12(5):343-348
We studied interrelationships among age, sex, and cross‐sectional cortical bone dimensions using quantitative computed tomography (QCT) scans of metatarsal bones of 180 moose (Alces alces) that died in Isle Royale National Park, Michigan. As a large‐bodied quadruped with demanding ecological constraints on movement and behaviour, a moose experiences different weight‐bearing and mechanical stressors than humans, to whom most existing studies of mechanical adaptations of bone pertain. In moose, both sexes showed significant subperiosteal expansion and an increase in medullary area, with an overall increase in cortical bone area over time. Female moose did not exhibit cortical thinning or reduction in cross‐sectional area with age, rather they showed an increase in cortical bone area with periosteal apposition exceeding endosteal resorption, similar to the males. We also found that moose undergo changes in bone geometry through remodelling of bone similar to humans, suggesting a compensatory mechanism for increasing bone strength under conditions of decline in bone mineral density with age. Copyright © 2002 John Wiley & Sons, Ltd. 相似文献
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Rolf Hiersche 《Indo-Iranian Journal》1965,8(3):165-170
Ohne Zusammenfassung 相似文献
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Rolf Sternberg 《European Planning Studies》2012,20(4):583-608
The European Commission in the scope of its cohesion policy tries to increase competitiveness of the European Union (EU) regions by supporting, beside many other instruments, entrepreneurial activities in the EU sub-national regions. This paper sheds an empirical light on the relationship between entrepreneurial activities and entrepreneurial perceptions on the one hand and the economic performance of regions eligible for EU regional policies in Spain and Germany on the other. Based on empirical data on the NUTS2 level, there will be analysis of whether previous EU support has later had an impact on entrepreneurial activities and/or entrepreneurial perception in the regions. The results show empirical evidence for a relationship between entrepreneurial activities and EU regional policies. However, other determinants such as gender and the role model function have an even stronger impact. Some of the results may help to increase the effectiveness of EC regional policies and of regional policies of the national governments, especially if the interdependence of entrepreneurship support policies and proper regional policies is considered. 相似文献
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Rolf Torstendahl 《History and theory》2003,42(3):305-331
The object of this essay is to discuss two problems and to present solutions to them, which do not quite agree with what is generally said of them. The first problem concerns the history of methods for reaching firm historical knowledge. In three methodological manuals for historians, written by J. G. Droysen, E. Bernheim, and C.‐V. Langlois and C. Seignobos and first published in the late nineteenth century, the task of the historian was said to be how to obtain firm knowledge about history. The question is how this message should be understood. The second problem concerns the differences between the three manuals. If their common goal is firm historical knowledge, are there any major differences of opinion? The answer given in this article is yes, and the ground is sought in their theories of truth. 相似文献