T he Great Recession generated large reductions in employment, earnings, and income for workers and families in the United States. The seasonally adjusted unemployment rate increased from 5 percent in December 2007 to 9.5 percent in June 2009, the start and end of the recession according to the National Bureau of Economic Research (NBER, at 〈http://www.nber.org/cycles.html〉). From 2007 to 2010,...

the non-differentiability and implicit definition of boundary of production possibility set (pps) in data envelopment analysis (dea) are two important difficulties for obtaining directional characteristics, including different elasticity measures and marginal rates of substitution. also, imposing weight restrictions in dea models have some shortcomings and misunderstandings. in this paper we ut...

The discussion between general practitioners (GPs) and healthcare delivery organizations necessitates a common language. The presentation of the 4 types of GP’s activities, opens dialogue but can lead to possible misunderstandings between the micro- and macro-level of the healthcare system. This commentary takes 4 examples: costs reduction by P4, priority of beneficence or nonmaleficence, role ...

We want to analyse in this article the process of ontological unification of personal world views to a common world view. The hypothesis that we want to put forward is that this process is badly understood and its misunderstandings are at the origin of some of the deep paradoxes about the nature of reality. The title might suggest that we will concentrate mostly on the process of unification th...

This paper reports the results obtained with a group of 24 14-year-old students when presented with a set of algebra tasks by the Leeds Modelling System, LMS. These same students were given a comporoble paper-and-pencil test crud detailed interviews some four months later. The latter studies uncovered several kinds of student misunderstandings that LMS had not detected. Some students had profou...