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101.
Alessandro Carretta Vincenzo Farina Duccio Martelli Franco Fiordelisi Paola Schwizer 《European Financial Management》2011,17(1):100-119
Stock market prices reflect information regarding firms’ business environments, operations and, in general, their fundamentals. Recently, various studies have analysed the link between news coverage and stock prices but no evidence exists on how channels and ways of communication of information affect investors’ behaviour. We analyses these aspects focussing on a large sample of corporate governance news published between 2003 and 2007 in ‘Il Sole 24 Ore’, Italy's major financial newspaper. We show that before news is made public investors are only able to assess the type of corporate governance event underlying it. After publication, investors are influenced by the content (positive or negative) and the tone of communication (strong or weak) of the news. 相似文献
102.
Maria Nadia Postorino Vincenzo Barrile Francesco Cotroneo 《Journal of Air Transport Management》2006,12(6):375-381
Despite the traffic increases at the World's airports, little works have been done on methodologies to improve vehicles and airplanes ground control. This may be leading to reduced safety. Here an integrated system is developed to help guarantee suitable separations of land vehicles and airplanes moving on the airport ground area It can also addressed issues of the optimal use of taxi and runways. The system is composed of global positioning systems hardware, checks on the position of land vehicles and airplanes on the ground in real time, and special-purpose geographical information systems software for the tracking of land vehicles and airplanes within different planning operations. 相似文献
103.
We add a public employment sector to the basic search and matching model in order to study the business cycle impact of public wage and employment policies. The government is assumed to follow exogenous rules for public wages and employment calibrated to match some cyclical features of US policies. These features include a positive public wage premium and mildly procyclical public wages and employment. We find that the presence of the public sector increases the volatility of employment and output. 相似文献
104.
In topological spaces, we introduce a new class of functions (pseudocontinuous functions) and we present some characterizations and properties. In particular, we show that any preference relation endowed of utility functions is continuous if and only if any utility is pseudocontinuous. A maximum theorem is proved for such a class of functions and connections with similar results are investigated. Finally, the existence of Nash equilibria for games with pseudocontinuous payoffs is obtained. 相似文献
105.
生态社区是一种兴起于西方国家的,以构建人与自然的平衡关系为目的的聚居单元。其在社会、文化及环境等各方面的努力,使其成为构建理想人居的重要模式,对其研究将有益于我国和谐居住区的建设。本文通过对国外生态社区成功案例的研究,深入分析了生态社区在开发可再生能源、运用生态技术方面的先进经验,并探究其成功经验在我国实施的可行性和必要性。 相似文献
106.
Valentina Carbone Valerie Moatti Vincenzo Esposito Vinzi 《Business Strategy and the Environment》2012,21(7):475-494
Corporate responsibility (CR) in general, and sustainable supply chain management in particular, have been a growing concern for companies and researchers over the past decade. However, in scholarly work, sustainability has often been dealt with in a generic fashion or from an anecdotal point of view. Further, research works examining CR on the one hand and sustainable supply chains on the other have been conducted separately. We undertake the multiple factor analysis of a CR rating database (Innovest) which reports longitudinal scores for both the social and environmental performance of 1198 companies in different countries and distinct industries, to demonstrate a strong relationship between CR and a sustainable supply chain. Our findings from exploratory analysis also illustrate the role of country of origin and industry in shaping CR behaviour, highlighting isomorphic as well as allomorphic trends for CR trough time. Copyright © 2012 John Wiley & Sons, Ltd and ERP Environment. 相似文献
107.
Alberto Galasso 《Journal of Economic Theory》2008,143(1):558-570
Building on Genicot and Ray [G. Genicot, D. Ray, Contracts and externalities: How things fall apart, J. Econ. Theory 131 (2006) 71-100] we develop a model of non-cooperative bargaining that combines the two main approaches in the literature of contracting with externalities: the offer game (in which the principal makes simultaneous offers to the agents) and the bidding game (in which the agents make simultaneous offers to the principal). Allowing for agent coordination, we show that the outcome of our bargaining procedure may differ remarkably from those of the offer and the bidding games. In particular, we find that bargaining can break agents' coordination and that the principal's payoff can be decreasing in his own bargaining power. 相似文献
108.
In this paper, we analyze the effect of gender quotas on women's involvement in political activity by using a rich data set providing information on all Italian local administrators who were elected from 1985 to 2007. Gender quotas were introduced by law in Italy in 1993 and were in force until 1995. Because of the short period covered by the reform, some municipalities never voted under the gender quota regime. This allows us to identify a treatment and a control group and to estimate the effects of gender quotas by using a difference-in-differences estimation strategy. Our estimates show that women's representation in politics after the reform increased significantly more in municipalities that were affected by the reform than in municipalities that were not affected. This result also holds true if we exclude from our analysis elections which took place during the period in which the reform was in force. Moreover, the higher women's representation in “gender quota municipalities” is not related to the advantages that women who were elected during the reform have obtained from incumbency and does not seem to be driven by differences in temporal trends between Southern and Northern regions. These findings suggest that affirmative actions can be of use in breaking down stereotypes against women. 相似文献
109.
The link between martingales and arbitrage is well-known in financial theory: arbitrage is not available if and only if there
exists an equivalent measure such that the discounted prices are martingales with respect to this measure (MME). As a consequence,
under MME, any previsible (non-anticipative) strategy cannot have secure (without risk) profit. Moreover, a careful reading
of a bootstrap proof of the first fundamental theorem of asset pricing (see Schachermeier (1992)) underlines the fact that,
if there is no possibility of arbitrage during any unit interval, then no arbitrage is allowed with any finite temporal horizon
strategy.
Mathematics Subject Classification (2000): Primary: 60G48; Secondary: 60G40, 60G07
Journal of Economic Literature Classification: C50, C72, D84 相似文献
110.
It is shown that time-series of US productivity and hours are apparently affected by a structural break in the late 60s. Moreover, the importance of technology shocks over the business cycle has sharply decreased after the break. 相似文献