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51.
This paper examines empirically the relationship between electricity spot and futures prices, by analysing a decade of data for a set of short term-to-maturity futures contracts traded in the Nordic Power Exchange. It is found that, on average, there are significant positive risk premiums in short-term electricity futures prices. The significance and size of the premiums, however, varies seasonally over the year; whereas it is greatest during winter, it is zero in summer. It is also found that time-varying risk premiums are significantly related to unexpectedly low reservoir levels. Furthermore, before the unprecedented supply-shock that hit the market around the end of year 2002, the risk premiums were related to the variance and the skewness of future spot prices. 相似文献
52.
We explore how gender bias in career opportunities affects matching in a marriage market with search frictions and where an individual’s fitness decays with age. We document a “being left on the shelf” effect where young singles, who find the marriage market rapidly thins with age, rush into early partnership. Singles with stronger career opportunities, however, have a greater option value to defer marriage. More equal career opportunities for women (captured by greater schooling and better occupations) potentially explain the recent emergence of toyboy unions, in which the woman is at least 5 years older than her partner. 相似文献
53.
54.
The cultural theory pioneered by Dame Mary Douglas has been tested with a range of research methods, but it has not yet been made subject to a ‘structured observation’. This method has been developed in psychology and management studies, and is especially useful for testing cultural theory’s prediction that fatalistic, hierarchical, egalitarian, and individualistic ways of perceiving and justifying tend to emerge in group debates about pressing social and environmental issues. We present the results of a structured observation of this prediction. Groups of high school students (aged 17–19) were asked for their opinions concerning three to five ‘wicked’ (i.e., highly complex) problems, and to discuss how to resolve them. Each utterance was coded according to the rationalities proposed by cultural theory. The results confirm cultural theory’s hypothesis that all four specific ways of defining, perceiving and resolving a wicked problem emerge when a number of people debate such an issue. We also discuss how Douglas’ cultural theory can be further developed and tested. Finally, we use our study to outline how the method of structured observation can contribute to political culture research in general. 相似文献
55.
Expected benefits and perceived risks of cloud computing: an investigation within an Italian setting
Over the past several years, cloud computing has increasingly been regarded as able to improve efficiency within organisations. The aim of this study is to address under-investigated issues related to the implementation of cloud computing, with a particular focus on expected benefits and the perception of risks. Towards this aim, on the basis of an adapted version of the technology acceptance model, we carried out a semi-structured survey among first-time cloud computing users to identify expected benefits and perceived risks. The survey of this study included a sample of 130 individuals in 65 enterprises located within Italy. We chose an Italian setting because it is characterised by an increasing number of programmes that emphasise the importance of cloud computing and support its wide dissemination. The findings of this study identify possible areas for improvement within the implementation phases of cloud computing. 相似文献
56.
Realized extreme quantile: A joint model for conditional quantiles and measures of volatility with EVT refinements
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We propose a new framework exploiting realized measures of volatility to estimate and forecast extreme quantiles. Our realized extreme quantile (REQ) combines quantile regression with extreme value theory and uses a measurement equation that relates the realized measure to the latent conditional quantile. Model estimation is performed by quasi maximum likelihood, and a simulation experiment validates this estimator in finite samples. An extensive empirical analysis shows that high‐frequency measures are particularly informative of the dynamic quantiles. Finally, an out‐of‐sample forecast analysis of quantile‐based risk measures confirms the merit of the REQ. 相似文献
57.
Caroline Straub Claartje J. Vinkenburg Marco van Kleef Joeri Hofmans 《International Journal of Human Resource Management》2018,29(22):3115-3135
AbstractEffective implementation of human resource (HR) policies appears to depend on supervisors’ active involvement in the intervention process. Following recommendations of a recent intervention evaluation framework, we examine how perceived supervisor support during the implementation of a work-life intervention helps to change participants’ perceptions of organizational family supportiveness, and how this ultimately changes participants’ engagement and turnover intentions. A three-wave longitudinal study in a professional services firm (N = 434) that has formally involved supervisors in the process of a work-life intervention showed support for our study hypotheses. Supervisor support for policy use influenced employees’ positive work–home culture perceptions, which in turn strengthened employees’ work engagement and diminished their turnover intentions over time. We discuss practical implications and give recommendations on the future design of HR interventions and related policies. 相似文献
58.
Marco Nicolosi 《Decisions in Economics and Finance》2018,41(1):1-17
I consider the problem of portfolio optimization for a manager whose compensation is given by the sum of a constant and a variable term. The constant term is a fixed percentage of the managed funds that is payed to the manager independently of his performance. The variable term is a premium that is proportional to the profit earned by the manager over a benchmark at a certain evaluation date. I find the optimal strategy and the optimal portfolio value in the Black–Scholes setting when the benchmark is a linear combination of the risky asset and the money market account. 相似文献
59.
Kayhan Tajeddini Alf H. Walle Mela Denisa 《International Journal of Hospitality & Tourism Administration》2017,18(2):195-218
Bali, the home of Indonesia’s Hindu minority, is experiencing a rapid growth in tourism and hospitality. The resulting opportunities for small scale, locally owned businesses has greatly benefited women. Using in depth interviews and other supplemental evidence, this trend is examined in order to explore how women are influenced by the circumstances faced, as well as by their culture and heritage. Doing so provides an empirical evidence regarding how women can contribute to the hospitality industry in places such as Bali. 相似文献
60.
We examine the relationship between participation in nonagricultural labor activities and farming production decisions, focusing on the use of inputs. Using longitudinal data for Vietnam from 1993 to 1998, we find that households engaged in nonagricultural labor spend significantly more on seeds, services, hired labor, and livestock inputs. This is consistent with the hypothesis that nonagricultural labor income relaxes credit constraints to farming. 相似文献