Que faut‐il voir dans les écarts de rémunération entre les travailleurs immigrés des pays du Golfe: l'effet d'a priori patronaux ou la simple conséquence de coûts d'opportunité différents?

Les auteurs s'intéressent aux disparités salariales entre les différents groupes de migrants qualifiés qui travaillent en grand nombre pour le secteur privé dans les États du Conseil de coopération du Golfe. Ils se demandent notamment si la prime salariale des Occidentaux (par rapport aux travailleurs venus d'Asie ou d'autres États arabes) découle d'éventuels a priori des employeurs. L'analyse, qui repose sur des données de 2012–2014 et sur deux méthodes de décomposition classiques, infirme l'hypothèse: les caractéristiques observables relatives à la productivité expliquent entre un tiers et trois quarts des écarts; le coût d'opportunité de la migration, supérieur pour les Occidentaux, explique la portion restante.     

Conservative linear programming with mixed multiple objectives

In an ordinary linear program a single objective vector is constructed and one attempts to choose a decision vector to optimize this objective. Often multiple criteria exist or exact estimates for the components of a single objective vector are not entirely clear. For these cases a conservative decision-maker may want to choose an alternative that maximizes the objective value under the worst foreseeable circumstances. Herein we develop a unified framework for applying the maximin criterion to problems with various degrees of uncertainty attached to the objective vector. Three cases are solved via linear programming: (1) Complete Information, (2) Partial Information, and (3) Total Ignorance. It is shown that the functional value of the maximin solution decreases in a convex manner with increasing uncertainty. In addition certain relationships between maximin and efficient solutions are provided. Finally, an extension to integer constrained decision variables is presented.     

Fossil fuel supplies simulation 1972–1979

Fossil fuels are an important source of energy for Ontario Hydro and purchases exceed $100 million per year. This paper describes a computer simulation of the inventory situation over an eight-year period, which is being used to assess the relationship between order flexibility and the target carry-over stocks at the beginning of each shipping season. A simple way of presenting the results for management evaluation is illustrated. Variations of the model are used to assess random influences, such as strikes, and to determine the economic balance between holding costs and stock-outs.     

Serving elders in greatest social and economic need: the challenge to the Elderly Nutrition Program

The federally funded Elderly Nutrition Program is mandated to serve elders in greatest social and economic need. Yet researchers have concluded that the program underserves certain groups of elders, including those who are socially impaired and homeless and members of ethnic and other minority groups. This paper reviews the issues involved in serving elders in greatest social and economic need and suggests that reaching all of these elders with program services is not only a laudable goal but also, based on innovative models briefly described, is clearly achievable.     

On the influence of market structure in modelling the US copper industry

Many of the contemporary models used to describe the behavior of the mineral industries assume a competitive market i.e. one in which market price is equal to marginal production cost. One such recent model of the worldwide copper industry is the MIDAS-II model developed for the Bureau of Mines [3, 4]. This model is used to project production and prices up through the year 2000. The purpose of this paper is to demonstrate the importance of the assumed market structure in the construction of these forecasts. If the market structure of the US copper industry is assumed to be comprised of a few large firms (an oligopoly), then forecasts based upon exactly the same data base differ significantly from the competitive market assumption.     

Breaking up is hard to do: Women's experience of dissolving their same-sex relationship

ABSTRACT

While prior research has compared same-sex to heterosexual relationships, very little attention has been paid to the unique experiences of women dissolving same-sex relationships, especially in the context of shifting legal and social policies. The current study examined the experience of 20 women who dissolved their same-sex relationship between 2002 and 2014. Participants were drawn from a longitudinal sample of same-sex and heterosexual couples and were interviewed using a semi-structured protocol. Interviews focused on three primary research questions: reasons for dissolution, emotional reactions, and role of legal status. While reasons for dissolution largely mirrored literature on women in heterosexual relationships, emotional reactions and the role of legal status were both influenced by sexual minority-specific factors related to minority stress and the recent societal changes pertaining to legal relationship recognition. Results are interpreted in a framework of minority stress and the ongoing legacy of institutional discrimination experienced by women in same-sex relationships.