This paper proposes a GARCH-type model allowing for time-varying volatility, skewness and kurtosis. The model is estimated assuming a Gram–Charlier (GC) series expansion of the normal density function for the error term, which is easier to estimate than the non-central t distribution proposed by [Harvey, C. R. & Siddique, A. (1999). Autorregresive Conditional Skewness. Journal of Financial and Quantitative Analysis 34, 465–487). Moreover, this approach accounts for time-varying skewness and kurtosis while the approach by Harvey and Siddique [Harvey, C. R. & Siddique, A. (1999). Autorregresive Conditional Skewness. Journal of Financial and Quantitative Analysis 34, 465–487] only accounts for non-normal skewness. We apply this method to daily returns of a variety of stock indices and exchange rates. Our results indicate a significant presence of conditional skewness and kurtosis. It is also found that specifications allowing for time-varying skewness and kurtosis outperform specifications with constant third and fourth moments. 相似文献
This paper analyses the efficiency of the Finnish Employment Service's management in selecting unemployed individuals who are offered a job. The database used considers short-term unemployed individuals who face the same labour market conditions in 1996. Duration analysis with a Weibull model has been performed in order to study the determinants of the transition probability from unemployment into employment and the impact of receiving job offers through the Employment Service (ES). In order to carry this out, it has been taken into account that the reception of such job offers may be endogenous because the ES selects the individuals who will receive the offers. The empirical results suggest that the decisions made by the ES are adequate in the sense that they increase the benefit of society, compared with a random assignment of the vacancies offered through the ES. Moreover, the effects of the other determinants depend on whether the individual receives offers. The results also point out that individuals who receive no offers through the ES are more likely, as time passes by, to be discouraged in searching for a job than those who do. 相似文献
Several critics have reopened the continuing debate regarding the credibility of the auditing profession in part because of
auditors’ reluctance to issue warning signals to investors. At the root of auditors’ lack of independence issues are conflicts
of interest resulting from the structural features of auditor–client relationship. The Throughput Model (TP) is advanced to
illustrate how ethical issues may be influenced by conflicts of interest. In the first stage, the TP provides an isolation
of auditors’ ethical positions from six ethical different perspectives. In the second stage, previous TP theory is built upon
by arguing a simultaneous analysis of how conflicts of interests may induce auditors’ behavior. We conclude that in the current
low litigation risk environment, auditors’ ethical behavior (both conscious and unconscious) is clearly ‹unbalanced’ favoring
the reluctance to issue warning signals. Finally, we offer a discussion of potential solutions to improve ethical issues.
The purpose of this study is to examine how workgroup diversity can be managed through specific strategic human resource management
systems. Our review shows that ‘affirmative action’ and traditional ‘diversity management’ approaches have failed to simultaneously
achieve business and social justice outcomes of diversity. As previous literature has shown, the benefits of diversity cannot
be achieved with isolated interventions. To the contrary, a complete organizational culture change is required, in order to
promote appreciation of individual differences. The paper contributes to this discussion by exploring the implications of
this change for human resource management, and explaining how the systems of practices should be changed when they are directed
to diverse groups. The model designed to test this notion includes: (1) demographic and human capital diversity as independent
variables, (2) group performance (measured as innovation outcomes) as the dependent variable and, (3) the orientation of the
strategic human resource management system as a potential moderator of this relationship. The main conclusion of the empirical
analysis developed is that different patterns of human resource management practices can be used, depending on the type of
diversity that the organization faces, and the specific effects that it wishes to manage. Concretely, three alternative management
systems are identified in this paper, with different moderating effects. This result has interesting implications for human
resource management professionals, explained in the last section. The limitations of this study are also discussed, as well
as some issues that future research in this field should address. 相似文献
Multinational corporations in the extractive sector have historically faced challenges to their property rights, particularly in oil. International business scholars argue that firms can decrease these challenges by approaching domestic legitimating actors or seeking home government support. Through a study of the operations of Standard Oil of New Jersey in Peru and Argentina in the twentieth century, we find that these legitimating strategies can backfire due to two main elements: first, the multinational might approach actors with a different agenda from those defining, delineating, and enforcing property rights. Second, host countries can use home government support to multinationals to delegitimise foreign firms' operations. 相似文献
This paper introduces a new line of research in international coastal mass tourism destinations. Such destinations have started to function in a more complex and potentially beneficial way, acting as transitional areas between the global city and local territory while at the same time developing their own unique characteristics. From this perspective, such destinations can potentially become environments for creativity and innovation, two factors that act as economic driving forces in the so-called “knowledge society”, thereby promoting the sustainable development of the destination from a socioeconomic perspective.
The methodology used herein develops 10 indicators that are calculated and mapped out for two case studies which examine the same geographical context and comparable populations in order to demonstrate the creative capacity of a location whose economy is heavily reliant on tourism. The results show that tourist destinations have greater potential for generating creative capital than non-tourist destinations. Therefore, the consolidation of international mass tourism destinations as creative and innovative spaces which are capable of generating creative capital without losing their competitiveness as tourist destinations merits a reconception of their current role in global–local networks. 相似文献
In this study, we analyze liquidity costs for stocks and ADRs from the four main Latin American markets. The results indicate that international investors are exposed to different trading costs in Latin America, with market location and firm size as important determinants. In the local market, stocks that cross-list internationally do not always present a liquidity cost advantage relative to non-cross-listed stocks. When the ADR and the local stock markets are compared, large firms present lower trading costs in the home market. The opposite occurs for small firms. 相似文献
Agroforestry systems have been promoted as sustainable land-use systems for regions where shifting agriculture is the traditional predominant land-use. Although environmentally sustainable, agroforestry systems require investment to establish that may affect their economic sustainability. In the southern Yucatan Peninsula 47 agroforestry plots of two timber and 10 fruit tree species were established with 22 farmers in three communities covering two rainfall zones and five soil types. Some fruit trees had wide adaptability to different soil, rainfall and management conditions, e.g. Manilkara zapota; others were restricted to the best soil, rainfall management conditions, e.g. Persea americana. The Meliaceae timber trees responded little to rainfall and soil, but stem borer attack was markedly lower in less intensively managed systems. Level of system maintenance greatly affected costs, but also opportunities for intercropping and obtaining immediate income. All levels of managements had negative net present value (NPV) for the three-year establishment phase, but so does traditional maize production. Farmers preferred to inter-crop their agroforestry systems, but were often limited by site quality. Determining sustainable agroforestry options for farmers requires multiple decisions related to species adaptability to the site, farmer production objectives and farmer capacity to invest in different management strategies. One production technology did not fit all. 相似文献
The article argues for a Marxist geopolitics that moves beyond both critical geopolitics and the discredited classical geopolitics. It underlines the valorisation of territory by capital across three levels of abstraction: that of social infrastructure, class conflict and ground-rent proper. The recent Russian-Ukrainian gas wars are briefly analysed by way of illustrating the application of this distinctive approach to geopolitics. 相似文献