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This paper examines seasonality and momentum jointly across national equity markets at the index level. We find that seasonality and momentum are almost uncorrelated and appear to arise from different global or local risk factors, rather than from different loadings on the same risk factors. Employing a trading strategy that integrates seasonality and momentum parametrically, we confirm our conclusion about the relationship between seasonality and momentum: while the pure seasonality and momentum strategies individually generate sizable and significant returns, the combination strategy significantly outperforms the pure strategies in a way that is quantitatively consistent with their lack of correlation. 相似文献
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Roberto Mazzoleni 《Economics of Innovation and New Technology》2013,22(6):499-515
Although university patenting has increased dramatically over the past three decades, debates persist regarding the broad economic implications of the phenomenon. This article examines the social welfare implications of university patenting in a model of R&D competition in which firms develop innovations on the basis of the disclosure of a university invention. When such disclosure does not preempt the patenting of downstream innovations, university patenting enhances social welfare only if a regime of open access to university inventions is characterized by excessive aggregate R&D from the viewpoint of social welfare. When the university invention disclosure preempts patenting on firms’ innovations, the nature of the open access equilibrium in the R&D market depends on the threat of imitation ex post. Only when the threat of imitation is sufficiently strong firms will not invest in downstream R&D in the open access regime. In this case, university patenting promotes R&D investment and increases social welfare. 相似文献
66.
Stephen K. Layson Dennis P. Leyden John Neufeld 《Economics of Innovation and New Technology》2013,22(7-8):689-697
A theoretical model is used to explore the determinants of the optimum size of a private research park and the effect of university affiliation on that optimum size. Parks are assumed to operate as cooperatives where costs are equally shared among the member firms, and optimality occurs when the firms’ average net benefits are maximized. To achieve this, existing members of a park will limit the park's size, denying entry to firms who wish to join and are willing to share the costs. University affiliation may either increase or decrease the optimum size of a park. 相似文献
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Each year, clients spend large sums on professional services, such as accounting services, legal services and consulting services. While research has found significant cross-country differences in organizations’ spending on professional services, we do not know why they occur. Inspired by the organizational buying behavior literature, this paper investigates the influence of national culture on the use of professional services, particularly management consulting services. As the use of professional services involves considerable uncertainties—particularly for the buyer—it can be assumed to be influenced by cultural differences regarding the level of Uncertainty Avoidance, Individualism and Masculinity. By drawing on two independent cross-country studies, we show that organizations in high uncertainty avoidance and individualistic cultures use professional services less than organizations in low uncertainty avoidance and collectivist cultures. We found no relationship between Hofstede's dimension of Masculinity and the use of professional services. The findings contribute to the theorizing on how the cultural context influences organizational buying behavior and the purchasing of professional services. 相似文献
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Paul Schreyer 《Economics of Innovation and New Technology》2013,22(5):339-376
Information and communication technology (ICT) products have undergone rapid technical change. Where quality improvements occur, they should be reflected in official price and quantity indices, otherwise there is a tendency to over-estimate price movements and under-estimate volume changes of ICT products. Statistical offices deal with this issue but the degree and nature of quality-adjustment of price indices of ICT products varies considerably between OECD countries. The present study simulates measurement effects on key economic variables (real output, private final consumption, government expenditure, investment, exports and imports) and productivity, under the assumption that the price indices of ICT products are fully quality-adjusted. The paper draws on a large selection of empirical studies to identify differences between quality-adjusted and unadjusted price changes and uses detailed information from input-output tables to assess their weights in final demand. Effects on GDP and its components are quantified for five selected OECD countries. 相似文献
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企业文化是企业的无形资产。在企业文化建设过程中,应该重视民族文化的基础作用,借鉴吸收其他民族和企业的优秀文化,有选择地吸收外来的企业文化。企业员工是创建企业文化的主体,要创造各种机会让全体员工参与进来,企业理念要得到员工的理解和认同,转化为员工的日常工作行为。要针对企业发展的具体情况,适时地赋予企业文化新内容,在求新求变中突出个性。 相似文献
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农村土地使用权流动研究 总被引:11,自引:0,他引:11
本文站在各个角度, 对当前土地使用权流动所面临的困惑进行了深入的分析, 揭示了土地流动的主要障碍是土地使用权流动的内生机制和外部环境、条件均不成熟。在分析的基础上提出了解决当前土地流动障碍的对策, 并进一步提出了土地证券化和土地股份公司制经营是土地流动和土地经营形式的发展趋势。 相似文献