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1.
The geography of opportunity: spatial heterogeneity in founding rates and the performance of biotechnology firms 总被引：3，自引：0，他引：3
One of the most commonly observed features of the organization of markets is that similar business enterprises cluster in physical space. In this paper, we develop an explanation for firm co-location in high-technology industries that draws upon a relational account of new venture creation. We argue that industries cluster because entrepreneurs find it difficult to leverage the social ties necessary to mobilize essential resources when they reside far from those resources. Therefore, opportunities for high tech entrepreneurship mirror the distribution of critical resources. The same factors that enable high tech entrepreneurship, however, do not necessary promote firm performance. In the empirical analyses, we investigate the effects of geographic proximity to established biotechnology firms, sources of biotechnology expertise (highly-skilled labor), and venture capitalists on the location-specific founding rates and performance of biotechnology firms. The paper finds that the local conditions that promote new venture creation differ from those that maximize the performance of recently established companies. 相似文献
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This article introduces the special issue of Prospects on “Aid effectiveness in education”. It brings together case studies of attempts in several very different contexts to improve
the effectiveness of the use of aid in the education sector. By drawing on the historical evolution of the new paradigm over
the last 20 years, the authors make the case for a closer focus on aid’s effectiveness in education, as well as the need to
reform the aid effectiveness architecture. In particular, they identify two major obstacles that need to be overcome to improve
aid’s effectiveness in education: the lack of sufficient institutional and staff incentives for coordinated and harmonized
behaviour; and factors that lead to risk-aversion and discourage innovation in delivering aid effectively. 相似文献
4.
Olav Gomo 《Journal of sports sciences》2016,34(3):232-238
The aim of this study was to examine the occurrence of the sticking region by examining how three different grip widths affect the sticking region in powerlifters’ bench press performance. It was hypothesised that the sticking region would occur at the same joint angle of the elbow and shoulder independent of grip width, indicating a poor mechanical region for vertical force production at these joint angles. Twelve male experienced powerlifters (age 27.7 ± 8.8 years, mass 91.9 ± 15.4 kg) were tested in one repetition maximum (1-RM) bench press with a narrow, medium and wide grip. Joint kinematics, timing, bar position and velocity were measured with a 3D motion capture system. All participants showed a clear sticking region with all three grip widths, but this sticking region was not found to occur at the same joint angles in all three grip widths, thereby rejecting the hypothesis that the sticking region would occur at the same joint angle of the elbow and shoulder independent of grip width. It is suggested that, due to the differences in moment arm of the barbell about the elbow joint in the sticking region, there still might be a poor mechanical region for total force production that is joint angle-specific. 相似文献
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We analyse determinants of prices for contemporary art with the help of quantitative data. The focus is on gallery rather than auction prices in the Netherlands. We model the determinants of prices on three different levels: the work of art (size, material), the artist (age, sex, place of residence, institutional recognition), and the gallery (location, institutional affiliation, age). Our main findings are that the size and material of works of art, and the age and place of residence of the artist are strong predictors of price; that differences in size and materials partly ``mask' price differences between artists; and that the variance in prices across galleries is largely explained by characteristics of the artists they represent. 相似文献
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Jon Olav Myklebust 《International Journal of Inclusive Education》2013,17(2):215-231
The main objective of specially adapted teaching in upper secondary education in Norway is to help students attain vocational or academic competence. However, a contested issue is whether it is conducive to place students with special educational needs in regular or special classes. Another question is whether boys and girls benefit to the same degree from placement in a specific type of class. The analyses presented in this article are based on data from a longitudinal study of nearly 500 adolescents with special educational needs who have been followed prospectively over 6 years. The results demonstrate that students receiving special support in regular classes obtain vocational or academic qualifications to a greater degree than students in special classes. In particular, girls benefit from placement in regular classes. This pattern does not change when the analyses control for relevant variables that are known to affect competence attainment, e.g. the students’ functional level registered at the start of upper secondary school. 相似文献
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Do young men and women diagnosed with special educational needs succeed in finding full‐time employment that provides sufficient income to live on? The analyses presented in this paper are based on interviews conducted between October 2001 and April 2002 of nearly 500 young people with various types of disabilities. The young people who were interviewed have been studied prospectively since they entered upper secondary school as special needs students six or seven years earlier. These adolescents are followed through a critical phase of life when they are trying to find their way in society as adult individuals. This process is gradual and involves making tentative steps in various arenas. A crucial topic is how these young men and women, between 23 and 25 years of age, succeed in gaining employment that allows them to become economically independent. This is a vulnerable process for most youth, but it is especially challenging for young people with functional difficulties who have experienced protracted and disjointed transitions throughout their educational trajectories. 相似文献
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Olav Sletta 《Scandinavian Journal of Educational Research》2013,57(3):183-190
The documentation given in the 1970s and 1980s of social skills deficits in children and adolescents who lack friends and other positive peer contacts is well‐known, and so is the increasing attention paid to social skill development. However, it seems that a broad or integrating theoretical framework for the analysis of social skills remains to be developed, and that this makes application of research findings and experiences in this area difficult. The article suggests a conceptualization of social skills as exchange resources, as a contribution to an integrating process. 相似文献
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Hallgeir Halvari Svein Olav Ulstad Tor Egil Bagøien Knut Skjesol 《Scandinavian Journal of Educational Research》2013,57(6):533-555
The purpose of the present study was to test a Self‐Determination Theory (SDT) process model in relation to involvement in physical activity and competitive performance among students (N = 190). In this model, perceived autonomy support from teachers and coaches was expected to be positively related to autonomous motivation, perceived competence, harmonious passion and action orientation, and that they would be positively related to involvement in physical activity and competitive performance. In using LISREL to test the model, autonomy support was positively linked with perceived competence, autonomous motivation, and action orientation. In turn, perceived competence (through harmonious passion), autonomous motivation, and action orientation were all positively associated with involvement in physical activity, whereas perceived competence and autonomous motivation were positively correlated with competitive performance. 相似文献
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We examined the extent to which and why early career transitions have led to women being underrepresented among faculty in the life sciences. We followed the careers of 6,336 scientists from the post-doctoral fellowship stage to becoming a principal investigator (PI) – a critical transition in the academic life sciences. Using a unique dataset that connects individuals’ National Institutes of Health funding histories to their publication records, we found that a large portion of the overall gender gap in the life sciences emerges at this transition. Women become PIs at a 20% lower rate than men. Differences in “productivity” (publication records) can explain about 60% of this differential. The remaining portion appears to stem from gender differences in the returns to similar publication records, with women receiving less credit for their citations. 相似文献