Default times, no-arbitrage conditions and changes of probability measures

In this paper, we give a financial justification, based on no-arbitrage conditions, of the (H)-hypothesis in default time modeling. We also show how the (H)-hypothesis is affected by an equivalent change of probability measure. The main technique used here is the theory of progressive enlargements of filtrations.     

Conic martingales from stochastic integrals

In this paper, we introduce the concept of conic martingales. This class refers to stochastic processes that have the martingale property but that evolve within given (possibly time‐dependent) boundaries. We first review some results about the martingale property of solution to driftless stochastic differential equations. We then provide a simple way to construct and handle such processes. Specific attention is paid to martingales in [0, 1]. One of these martingales proves to be analytically tractable. It is shown that up to shifting and rescaling constants, it is the only martingale (with the trivial constant, Brownian motion, and geometric Brownian motion) having a separable diffusion coefficient and that can be obtained via a time‐homogeneous mapping of Gaussian diffusions. The approach is exemplified by modeling stochastic conditional survival probabilities in the univariate and bivariate cases.     

Hazard rate for credit risk and hedging defaultable contingent claims

We provide a concise exposition of theoretical results that appear in modeling default time as a random time, we study in details the invariance martingale property and we establish a representation theorem which leads, in a complete market setting, to the hedging portfolio of a vulnerable claim. Our main result is that, to hedge a defaultable claim one has to invest the value of this contingent claim in the defaultable zero-coupon.Received: April 2003Mathematics Subject Classification: 91B24, 91B29, 60G46JEL Classification: G10The authors would like to thank D. Becherer and J.N. Hugonnier for interesting discussions and the anonymous referee whose pertinent questions on the first version of this paper help them to clarify the proofs. All remaining errors are ours.     

Role and Current Status of IFRS in the Completion of National Accounting Rules – Evidence from Malta

Abstract

We analyse the extent to which International Financial Reporting Standards (IFRS) have influenced the development of the national generally accepted accounting principles (GAAP) in the transposition of Directive 2013/34/EU in Malta including whether they are used as a reference point in the interpretation of the national GAAP. Malta mandated the use of IFRS by all companies for a significant number of years. This has resulted in IFRS influencing the development of the national GAAP; and enforcers and other key stakeholders viewing IFRS positively.     

Risk communication and social media during food safety crises: a study of stakeholders’ opinions in Ireland

Social media is a particular communication platform which has witnessed an exponential growth in use and influence in recent years, democratising the communication process, and offering risk communicators a way of putting into practice those principles which are advocated to be at the core of risk management and communication. However, little is known about stakeholders’ willingness to embrace this new form of communication in a food crisis. The current study presented an exploratory investigation of the opinions of Irish stakeholders on the position of risk communication in a crisis, with a particular focus on understanding what application social media may have. In-depth one-to-one interviews were carried out with key stakeholders holding frontline positions in managing and communicating about risk in the food sector in Ireland. The stakeholders identified risk communication as a central activity in a food safety crisis, driven by an obligation to protect both consumer health and the reputation of the Irish food sector. Stakeholders relied primarily on risk communication to disseminate information in a crisis so to educate and inform the public on a risk and to prevent confusion and alarmism; most did not explicitly value two-way risk communication in a crisis. The ability to effectively manage future crises may depend on stakeholders’ willingness to adapt to the changing communication landscape, namely – their willingness to adopt social media and use it effectively. The findings indicate that the stakeholders interviewed are appreciative of the need to engage with social media in times of a food safety crisis. However, most valued social media as a one-way channel to help spread a message and there was little reference to the interactive nature of this medium. Implications for integrating social media into crisis risk communication strategies are discussed.     

Estimating intergenerational schooling mobility on censored samples: consequences and remedies

In this paper we estimate the impact of parental schooling on child schooling, focus on the problem that children who are still in school constitute censored observations, and evaluate three solutions to it: replacement of observed with expected years of schooling, maximum likelihood approach, and elimination of all school‐aged children. Using intergenerational data from the Wisconsin Longitudinal Study we test how the three correction methods deal with censored observations. The one that treats parental expectations as if they were realizations seems to fix the censoring problem quite well. Copyright © 2009 John Wiley & Sons, Ltd.     

HRM and strategic climates in hospitals: does the message come across at the ward level?

This study examined how employees perceive intended strategic goals and HRM at the ward level, and if these perceptions generate the desired effects. The qualitative part of the research reveals that the hospital pursues two strategic goals (i.e. quality and safety). Analysis of the questionnaire data (N = 576 respondents; 59 wards) shows that both climate dimensions could be distinguished. Results showed that the perceived HR system does have a significant influence on both climate dimensions, suggesting that the overall message of the HR system is important for creating strategic climates. Furthermore, the climate for quality partially mediated the relationship between the perceived HR system and commitment.     

Gender,family and career in the era of boundarylessness: determinants and effects of intra- and inter-organizational mobility

Changes in patterns of long-term employment make understanding the determinants of different career forms increasingly important to careers research. At the same time, the rise of dual-earner families demands greater attention to the ways in which gender and family characteristics shape careers than has been paid by traditional research. This paper addresses these issues, examining the determinants and consequences of intra-organizational and inter-organizational mobility, using a sample of employees from dual-earner couples. We find significant gender differences in these different types of career mobility, and in the effect of family relations on different forms of mobility. Women experience more inter-organizational mobility, while men experience more intraorganizational mobility. Having more children positively influences men's intra-organizational mobility, but increases inter-organizational mobility for women. Marital instability increases intra-organizational mobility among women, but has no effect among men. Each form of mobility has distinctive effects on objective and subjective indicators of career success for both men and women. Moving between organizations tends to depress earnings, but has no effect on how successful people feel in their careers. Job changes within an organization increase earnings, but have a negative effect on perceived success.     

Intellectual property rights as development determinants

Abstract While intellectual property rights (IPRs) are the key drivers of economic performance in R&D based growth models, they have not been fully explored in empirical development studies. We introduce IPRs to this literature, using Two‐Stage Least Squares Bayesian Model Averaging to address endogeneity and model uncertainty at the instrument and income stages. We show that IPRs exert effects similar to ‘Rule of Law’ and therefore provide robust evidence that both physical and intellectual property rights are crucial development determinants. We document that unenforced IPRs exert no effect on development. Instead, it is the level of enforced IPRs that causes development.