On optimal unemployment compensation

The design of an optimal unemployment compensation scheme is analyzed, using a dynamic principal-agent relationship between a risk-neutral planner (the principal) and risk-averse workers (the agents), where the planner's inability to observe workers’ job-search efforts creates a moral hazard problem. To design an implementable scheme, we require that each agent is guaranteed a minimum level of expected discounted utility, regardless of his past history. In contrast with previous studies, we find that the optimal contract is quite close to actual unemployment compensation schemes, both qualitatively and quantitatively.     

Successful Psychopaths: Are They Unethical Decision-Makers and Why?

Successful psychopaths, defined as individuals in the general population who nevertheless possess some degree of psychopathic traits, are receiving increasing amounts of empirical attention. To date, little is known about such individuals, specifically with regard to how they respond to ethical dilemmas in business contexts. This study investigated this relationship, proposing a mediated model in which the positive relationship between psychopathy and unethical decision-making is explained through the process of moral disengagement, defined as a cognitive orientation that facilitates unethical choice. The results of the study supported this model, and implications for theory and practice are discussed.     

The restructuring of the institutional real estate portfolio in the UK

Real estate investment portfolios of financial institutions have seen dramatic changes over the last three decades or more. Historically such property investment decisions have been seen within a portfolio diversification paradigm that has sought to balance risk and return. This paper considers the role of the supply of assets in the determining and constraining the UK institutional portfolio. The supply of real estate assets not only expands during property booms but has also been transformed by a long term urban development cycle as cities adapt to cars and the ICT revolution that has brought new property forms. The research examines long term trends in investment change by disaggregating into ten property forms rather than the usual three land use sectors. It then assesses to what extent investment patterns can be explained in terms of portfolio theory, short term net returns of individual sectors or driven by the supply of real estate assets. It concludes that the supply of real assets is an overlooked explanation.     

The challenge for women expatriates and spouses: some empirical evidence

This is an exploratory study examining issues associated with women expatriates and their spouses. Individuals representing three groups - organizations, women expatriates, male spouses - were interviewed to identify their experiences and concerns. The authors conclude that this issue will pose a dramatic challenge for international organizations in the coming decades, and that it is timely to investigate the issue in more depth.     

The Reallocation of Labour and the Lifecycle of Firms

This paper uses a unique US panel dataset of firms and workers toinvestigate the relationship between the firm's lifecycle and the reallocation of labour. We distinguish labour reallocation associated with job reallocation, and reallocation of workers over a fixed configuration of jobs. We find that firms at the beginning and end of their lifecycles contribute disproportionately to labour market lows, with sorting between firms particularly important among young firms, whereas sorting within firms is moreimportant among mature firms. We also find that high churning lows are associated with a lower probability of a young firm surviving.     

Determinants of Traditional Sustainability Reporting Versus Integrated Reporting. An Institutionalist Approach

The aim of this study is to analyze similarities and differences between companies with traditional sustainability reporting (TSR) and those that publish integrated reports. Based on institutional theory we identify potential determinants of integrated reporting (IR) and test their relevance empirically in a sample of 309 companies. Our analysis shows that IR companies are different from TSR companies with regard to several country‐level determinants. In particular, investor and employment protection laws, the intensity of market coordination and ownership concentration, the level of economic, environmental and social development, the degree of national corporate responsibility and the value system of the country of origin proved to be relevant. Based on these results, both implications for practice and future studies are derived. Copyright © 2011 John Wiley & Sons, Ltd and ERP Environment.     

Modelling the Risks Associated with the Increased Importation of Fresh Produce from Emerging Supply Sources Outside the EU to the UK

The risk of non‐indigenous plant pests entering the UK via international trade in fresh produce is increasing. The objective of this article is to identify existing and emerging supply sources for UK fresh produce importers and examine the extent to which they could provide invasion pathways. We tested the hypothesis that increased imports of fresh produce from new sources outside the European Union could increase the risks of non‐indigenous insect pests. We use a bio‐economic model approach in which the number of species arrivals is a function of the volume of imports, whereas the volume of imports itself is a function of gross domestic product, relative import prices and seasonality. The study has identified clear trends, which show import volumes of fresh produce and species detections increasing from new supply sources. If this trend continues in the future, then the UK inspection agency should expect to confront species from new suppliers in much greater numbers, given that import volumes of fresh produce are income elastic.     

Multidimensional quasi-Monte Carlo Malliavin Greeks

The aim of this paper is extensively investigate the performance of the estimators for the Greeks of multidimensional complex path-dependent options obtained by the aid of Malliavin Calculus. The study analyses both the computation effort and the variance reduction in the Quasi-Monte Carlo simulation framework. For this purpose, we adopt the approach employed by Montero and Kohatsu-Higa to the multidimensional case. The multidimensional setting shows the convenience of the Malliavin Calculus approach over different techniques that have been previously proposed. Indeed, these techniques may be computationally expensive and do not provide enough flexibility for variance reduction. In contrast, the Malliavin approach provides a class of functions that return the same expected value (the Greek) with different accuracies. This versatility for variance reduction is not possible without the use of the generalized integral by part formula of Malliavin Calculus. In the multidimensional context, we find convenient formulas that permit to improve the localization technique, introduced in Fournié et al. and reduce both the computational cost and the variance. Moreover, we show that the parameters for the variance reduction can be obtained on the flight in the simulation. We illustrate the efficiency of the proposed procedures, coupled with the enhanced version of Quasi-Monte Carlo simulations as discussed in Sabino, for the numerical estimation of the Deltas of call, digital Asian-style and exotic basket options with a fixed and a floating strike price in a multidimensional Black-Scholes market. Given the fact that the gammas of a call option coincides, apart from a constant, with the deltas of digital options, this setting also covers the analysis of formulas tailored for the second order Greeks of call options.