Some properties of hazard rate functions of systems with two components

In this paper we compare the hazard rate functions of two parallel systems, each of which consists of two independent components with exponential distribution functions. The paper gives various conditions under which there exists a hazard rate ordering between the two parallel systems. It is also shown that some of these conditions are both sufficient and necessary. In particular, it is proven that if the vector consisting of the two hazard rates of the two exponential components in one parallel system weakly supmajorizes the counterpart of the other parallel system, then the first parallel system is greater than the second parallel system in the hazard rate ordering. This paper further compares the hazard rate functions of two parallel systems when both systems have components following a certain bivariate exponential distribution.     

Droit aux congés et conciliation entre travail et vie familiale dans les pays développés: pourquoi les travailleurs des Etats‐Unis sont perdants

A partir d'un indice synthétique des dispositions réglementaires sur les congés annuels et familiaux en Europe occidentale, aux Etats‐Unis, au Canada, en Australie, au Japon et en Corée, les auteurs classent ces pays quant au soutien à l'équilibre entre travail et famille. Les Etats‐Unis arrivent derniers: les employeurs ne sont pas tenus d'accorder des congés annuels, et les salariés ne peuvent prendre plus de douze semaines de congés par an pour raisons familiales. Ces normes comparativement basses s'expliqueraient par une conception fondée sur le libre marché et un postulat d'égalité de rapport de forces entre employeur et salarié. Vision qui n'est pleinement partagée par aucune des autres démocraties examinées.     

Adoption in Korea: current status and future prospects

This article examines the current status of adoption in Korea and discusses the issues that must be addressed for future development. The nature of adoption has changed dramatically in the last 50 years, and continues to change in Korea. If the first half of modern adoption history were about finding and providing permanent homes for war orphans and children abandoned out of destitution, the second half saw increasing demand for adoption to function as a key component of the continuum of child welfare services providing care for children who need protection and care outside their home. However, responding to this change has been a challenge over the years. Based on the analysis of recent trends of the child welfare system and adoption in Korea, this article reveals that there are significant barriers in the path to improving adoption, especially domestic adoption, so that it can be considered a realistic placement option for children who need protection and care in Korea. Suggestions for the future direction of reforming adoption policy and practice are given.