MULTIVARIATE VOLATILITY MODELING OF ELECTRICITY FUTURES

We model the dynamic volatility and correlation structure of electricity futures of the European Energy Exchange index. We use a new multiplicative dynamic conditional correlation (mDCC) model to separate long‐run from short‐run components. We allow for smooth changes in the unconditional volatilities and correlations through a multiplicative component that we estimate nonparametrically. For the short‐run dynamics, we use a GJR‐GARCH model for the conditional variances and augmented DCC models for the conditional correlations. We also introduce exogenous variables to account for congestion and delivery date effects in short‐term conditional variances. We find different correlation dynamics for long‐ and short‐term contracts and the new model achieves higher forecasting performance compared to a standard DCC model. Copyright © 2012 John Wiley & Sons, Ltd.     

Advances in Joint Modelling: A Review of Recent Developments with Application to the Survival of End Stage Renal Disease Patients

The use of joint modelling approaches is becoming increasingly popular when an association exists between survival and longitudinal processes. Widely recognized for their gain in efficiency, joint models also offer a reduction in bias compared with naïve methods. With the increasing popularity comes a constantly expanding literature on joint modelling approaches. The aim of this paper is to give an overview of recent literature relating to joint models, in particular those that focus on the time‐to‐event survival process. A discussion is provided on the range of survival submodels that have been implemented in a joint modelling framework. A particular focus is given to the recent advancements in software used to build these models. Illustrated through the use of two different real‐life data examples that focus on the survival of end‐stage renal disease patients, the use of the JM and joineR packages within R are demonstrated. The possible future direction for this field of research is also discussed.     

Mixed methods studies in entrepreneurship research: Applications and contributions

Mixed methods research is becoming an increasingly popular approach in several fields. However, its application in the field of entrepreneurship has not been studied. The authors reviewed the use of mixed methods research in three entrepreneurship journals and two leading generalistic journals that publish entrepreneurship research, examining the main purposes and designs. A total of 955 articles were reviewed and 81 mixed methods studies were identified. The analysis of these articles revealed opportunities associated with the application of this approach. Mixed methods may help to improve entrepreneurship research addressing challenges emphasized in earlier studies. Suggestions on why and how to use mixed methods research are offered, and recommendations are provided to guide future mixed methods studies to advance our understanding of the entrepreneurial phenomenon.     

Flexible work practices and human resource management: a comparison of South African and foreign owned companies

This study compares the use of flexible work practices in wholly owned South African (SA) companies with that in foreign-owned companies. Data were obtained from questionnaire results of a study conducted by Horwitz and Franklin (1996) of flexible work practices in SA organizations. The questionnaire was used as part of a collaborative research project involving three countries (Brosnan et al ., 1996). It was found that SA-owned companies use certain flexible work practices to a lesser extent than foreign-owned companies. This was found to be the case particularly in the use of numerical forms of flexibility, such as sub-contractors/consultants and the use of temporary employees. Use of subcontractors/consultants and temporary staff agencies was found to be the greatest in partially foreign-owned companies. A larger proportion of foreign-owned companies have lower labour costs than do SA-owned companies. This has, however, not been as a result of the greater use of flexible work practices. Foreign-owned companies make more joint decisions with unions than do SA-owned companies when changing work practices.     

Capitalization of Costs and Expected Earnings Growth

Abstract

This paper offers a model that shows how the capitalization of costs affects contemporaneous earnings and the growth path of expected earnings. It makes three points. First, reported earnings under successful efforts are more price relevant than earnings under full costing or full expensing. Second, whether conditional or unconditional, conservatism always enhances the growth rate of expected earnings. Third, independent of capitalization policy, the long-run expected earnings growth rate converges either to the long-run expected free cash flow growth rate or to the depreciation rate. Therefore, while capitalization policy affects the price relevance of earnings and short-run expected earnings growth, it does not affect long-run expected earnings growth.     

NOTES ON CONTRIBUTORS

Abstract

Within public administration and policy sciences the concept of policy networks nowadays is well accepted. Not much attention has been paid so far to strategies aimed at institutional design. Therefore, in this article, we develop a conceptual framework to study institutional design more thoroughly. We do this by specifying the nature and variety of institutional rules that guide the behaviour of actors within networks. Given this categorization of rules, we identify possible strategies to change network rules. Next, we focus on the strategic context of attempts to influence the nature of institutional rules: the process of institutional design. We conclude with suggestions to apply the conceptual framework to empirical research into the forms, impacts and implications of attempts to change the institutional features of policy networks.     

Flexible work arrangements in Greece: a study of employee perceptions

The purpose of this study is twofold: first, to explore factors that affect employees' perceptions towards flexible work options; second, to examine whether the perceived benefits and barriers associated with work flexibility predict one's decision to participate in flexible work arrangements or not. A total of 362 Greek employees participated in the study to determine their attitudes towards flexible work practices. Univariate analyses of variance and logistic regression analysis were conducted with the aim of exploring the research hypotheses. It is found that attitudes towards flexible work options are dependent on gender, sector of employment and prior participation in a flexible work scheme. In general, women, public sector employees and employees who have participated in flexible work arrangements are more likely to perceive more benefits and fewer costs with regard to the use of work flexibility. Further analysis provided evidence that work–life balance benefits are stronger predictors of participation in flexible work practices. These findings suggest that employee-centred organisations that view flexibility as a valuable management tool, should deal with specific barriers that discourage people from taking up flexible work arrangements. Given the dearth of empirical research on work flexibility in Greece, the findings of this study provide the wider academic community with new insights on employees' perceptions of flexible work options.     

Investment in staff development within an emergency services organisation: comparing future intention of volunteers and paid employees

Path models were evaluated to explore the impact of job satisfaction as mediator of the relationship between perceived investment in employee development (PIED) and the adequacy and availability of training on turnover intention. Models were compared for volunteers (n = 2,306) and paid employees (n = 274) within the one emergency services organisation. Results indicated that job satisfaction mediated the relationship between PIED and intention to stay for both volunteers and paid employees. PIED was a stronger predictor of job satisfaction for paid employees, while support and recognition was a stronger predictor of job satisfaction for volunteers. Results highlight the indirect role of PIED on turnover intentions. Findings also support the notion of tailored employee development programmes that enhance job satisfaction. Further, PIED may be more salient to the turnover intentions of paid employees, while support and recognition may be a key motivator of volunteers' ongoing commitment to the organisation.     

New public management and organisational commitment in the public sector: testing a mediation model

This paper focuses on the attitudes of learning professionals towards New Public Management (NPM). In a survey of the UK further education sector (n = 433), NPM beliefs were found to be positively associated with both affective and normative organisational commitment. However, as expected, NPM beliefs were not found to be related to continuance organisational commitment. The results also show that although perceived organisational support mediates the relationship between NPM beliefs and affective organisational comment, it is only a partial mediator of the relationship between NPM beliefs and normative organisational commitment. The theoretical and practical implications of these findings, and potential directions for future research, are discussed.     

Security in a sea of insecurity: job security and intention to stay among service sector employees in Turkey

This article examines the association between job security and intention to stay for those who are employed in Turkey. There is a high level of unemployment in the country and many workers there are concerned about their job security. Job security refers to the objective dimensions of continuous contract, working full-time hours and paid and unpaid overtime. Job security also refers to the subjective dimension of perceived job security. We surveyed 407 employees in banking and related sectors' call centres, five-star hotel front-line staff and airline cabin crews. Results show that objective dimensions of job security are not associated with intention to stay. However, perceived job security is significantly and positively associated with intention to stay. We recommend that human resource managers focus on the perceived job security aspect of employment to keep valuable employees with the company.