Do women directors contribute to R&D? The role of critical mass and expert power

Journal of Management and Governance - The paper provides insights into the implications for innovation input of having women on company boards. It sheds light on the effects of critical mass and...     

Afghan Migratory Strategies and the Three Solutions to the Refugee Problem

The present article proposes three main theses: the normalityof movements and the prior existence of transnational networksin and around Afghanistan; the resilience and inventivenessof the Afghan population, especially illustrated by the remittancesystem; the relevance of migratory movements and of transnationalnetworks for the reconstruction of the country and the stabilityof the region. In contrast to the migratory strategies developedby the refugees, the three solutions to the problem of the refugeespromoted by the UNHCR (voluntary repatriation in the countryof origin; integration in the host country; resettlement ina third country) are based on the idea that solutions are foundwhen movements stop. But mobility may be seen as a key livelihoodstrategy. A more comprehensive solution is needed, which takesinto account the full range of strategies and responses developedby the Afghan population, including the back-and-forth movementsbetween Afghanistan, Pakistan, Iran and beyond.     

Robustness of Optimal Investment Decisions in Mixed Insurance/Investment Cyber Risk Management

An integrated risk management strategy, combining insurance and security investments, where the latter contribute to reduce the insurance premium, is investigated to assess whether it can lead to reduced overall security expenses. The optimal investment for this mixed strategy is derived under three insurance policies, covering, respectively, all the losses (total coverage), just those below the limit of maximum liability (partial coverage), and those above a threshold but below the maximum liability (partial coverage with deductibles). Under certain conditions (e.g., low potential loss, or either very low or very high vulnerability), the mixed strategy reverts however to insurance alone, because investments do not provide an additional benefit. When the mixed strategy is the best choice, the dominant component in the overall security expenses is the insurance premium in most cases. Optimal investment decisions require an accurate estimate of the vulnerability, whereas larger estimation errors may be tolerated for the investment-effectiveness coefficient.     

Ridge regression versus ols by pitman's closeness under quadratic and fisher's loss

The existence of values of the ridge parameter such that ridge regression is preferable to OLS by the Pitman nearness criterion under both the quadratic and the Fisher's loss is shown. Preference regions of the two estimators under the above loss functions are found. An upper bound for the value of the Pitman's measure of closeness, independent of a deterministic or stochastic choice of the ridge parameter, is given.     

Marriage as a commitment device

Non-cooperative couples are inefficient. Cooperation raises the utility of both parents, and of each child, but does not guarantee efficiency. In the presence of credit rationing, a cooperative equilibrium may not exist outside marriage, because the main earner cannot credibly promise to compensate the main childcarer at some future date, and may not be able or willing to do so at front. By allowing the main childcarer to credibly threaten divorce if the main earner does not deliver the promised compensation when the time comes, marriage makes that promise credible, and thus increases the probability that a cooperative equilibrium will exist. In a separate-property jurisdiction, a reduction in the cost or difficulty of obtaining a divorce increases married women??s participation in the labour market. In a community-property one, it has no such effect.     

Social norms, cognitive dissonance and the timing of marriage

We present a model of courtship in which the timing of marriage is affected by the cognitive dissonance between perceived norms and personal aims. We argue that as long as the family has been the main provider of social protection, marriage has been favoured by strongly felt social norms, and thus people accepted less-than-ideal partners early on in their search in order to minimise the dissonance caused by the non-adherence to the custom. Once the Welfare state has replaced the family, these norms have lost their strength, so that agents can afford the luxury of searching their preferred partners at length without feeling at odds with their social duties. The model yields predictions in line with relevant stylised facts: the raising age of marriage, the prevalence of assortative mating and the common occurrence of divorce in the early years of marriage. We finally discuss the impact of late marriages on fertility, and argue that there need not be negative consequences if the declining role of the family becomes socially accepted, and alternative arrangements are made possible and indeed encouraged by means of an appropriate family policy.     

Macro‐demographic effects of the transition to adulthood: Multistate stable population theory and an application to Italy

We exploit a multistate generalisation of a classical, one‐sex, stable population model to evaluate structural and long‐term effects of changes in the attainment of adulthood. The demographic framework that inspired this paper is provided by Italy, where a strong delay in the transition to adulthood and union formation has been observed over the last several decades. Italy has also experienced very low fertility levels, and the subsequent ageing problems have become of primary concern. We first discuss a theoretical framework based on the model developed by Inaba (1995) and then include the process of transition to adulthood. We consider explicitly some specifications of the general model, and we present two distinct empirical applications, one using macrosimulation and the other one using a linear approximation. Our principal aim is to evaluate the impact of the delay in the attainment of adulthood on reproduction and on the age structure of the population.     

Three doors anomaly, “should I stay,or should I go”: an artefactual field experiment

Theory and Decision - This work aims to identify and quantify the biases behind the anomalous behavior of people when they deal with the Three Doors dilemma, which is a really simple but...     

Logistic Game™: learning by doing and knowledge-sharing

The aim of this article is to define a new simulation game in operation management called Logistic Game?. The main objectives are to introduce a new simulation game approach in solving the different correlated subsystems based on ‘visual interactive learning’ and to verify its positive effects on the learning process with respect to the usual simulation games. The game is based on an inside plant virtual supply chain simulation and copes with the educational challenges of teaching Industrial Logistics in a new, effective way. By applying a visual interactive simulation package, the game creates a virtual dynamic scenario directly visible by participants, with an improvement of experimentation and conceptualisation phases, and offers several logistic decisions and their strategic links from a holistic point of view. The challenge goes beyond a pure theoretical setting and students learn strategies and gain experience directly by operating in a virtual supply chain and sharing knowledge. The Logistic Game has been used to train more then 300 students since December 2006 in three different Italian workshops and has been designed to encourage the employment selection process by the companies involved.     

A Contingency Model of Boards of Directors and Firm Innovation: The Moderating Role of Firm Size

This study asserts that the effects of board characteristics on firm innovation need to be evaluated with reference to contingency variables. A literature review suggests that relatively few studies adopt a contingency view when examining the outcomes of boards of directors. This study examines the influence on firm innovation of characteristics such as board size, outsider ratio and board diversity, and suggests that their influence is contingent upon firm size. The model is tested on a sample of Italian companies and finds support for the contingency hypothesis. This study advances research on boards of directors by emphasizing the importance of context.