Operational Research in Education

Operational Research (OR) techniques have been applied, from the early stages of the discipline, to a wide variety of issues in education. At the government level, these include questions of what resources should be allocated to education as a whole and how these should be divided amongst the individual sectors of education and the institutions within the sectors. Another pertinent issue concerns the efficient operation of institutions, how to measure it, and whether resource allocation can be used to incentivise efficiency savings. Local governments, as well as being concerned with issues of resource allocation, may also need to make decisions regarding, for example, the creation and location of new institutions or closure of existing ones, as well as the day-to-day logistics of getting pupils to schools. Issues of concern for managers within schools and colleges include allocating the budgets, scheduling lessons and the assignment of students to courses. This survey provides an overview of the diverse problems faced by government, managers and consumers of education, and the OR techniques which have typically been applied in an effort to improve operations and provide solutions

Your money and your life: risk attitudes over gains and losses

Prospect theory is the most influential descriptive alternative to the orthodox model of rational choice under risk and uncertainty, in terms of empirical analyses of some of its principal parameters and as a consideration in behavioural public policy. Yet the most distinctive implication of the theory – a fourfold predicted pattern of risk attitudes called the reflection effect – has been infrequently studied and with mixed results over money outcomes, and has never been completely tested over health outcomes. This article reports tests of reflection over money and health outcomes defined by life years gained from treatment. With open valuation exercises, the results suggest qualified support for the reflection effect over money outcomes and strong support over health outcomes. However, in pairwise choice questions, reflection was substantially ameliorated over life years, remaining significant only for treatments that offered short additional durations of life

Adjusting risky situations: A theoretical framework and empirical test

Experienced executives frequently try to modify the risky situations they face in order to make them more favorable rather than simply choosing from among available decision options. This article investigates several types of risk adjustments such as trying to influence the situation through bargaining and spending resources, gathering information, developing new options, and consulting one's superiors. A theoretical framework is presented that characterizes different types of adjustments and relates them to variables such as perceived risk, perceived control, perceived responsibility, decisiveness, and risky choice. The framework is tested using experienced decision makers who respond to four simulated risky business decisions. © 1988 Kluwer Academic Publishers.link_to_subscribed_fulltex

A novel pathway of soil organic matter formation by selective preservation of resistant straight-chain biopolymers: chemical and isotope evidence

International audienceA resistant soil organic residue, ‘humin', has been analysed by solid-state 13C-NMR and pyrolysis followed by molecular and 13C determination of the pyrolysate alkane-alkene fraction. The results show the occurrence of highly aliphatic, straight-chain biopolymer material as a substantial part of soil organic matter. They confirm the hypothesis by which a part of soil organic matter can be formed by selective preservation of resistant highly aliphatic microbial polymers. This pathway comes in addition to the longstanding neogenesis hypothesis involving recondensation of small polar molecules such as amino acids, carbohydrates and phenols