Choice correspondences for public goods

We consider collective choice problems where a group of agents has to decide on the location of a public facility in a Euclidean space. A well-known solution for such problems is the coordinatewise median of the reported votes and additional fixed ballots. Instead of adding ballots, we extend the median solution by allowing set-valued outcomes. This especially applies for location problems with an even number of agents. Received: 14 August 1998/Accepted: 29 August 2000     

The environmental value of buildings: a proposal for performance assessment with reference to the case of the tall office building

Buildings consume approximately 33% of the world's energy, equivalent to 21% of global CO₂ emissions (IEA 2009, World energy outlook 2009, http://www.iea.org/weo/electricity.asp). Given the current scenario of energy consumption in buildings, the objective of this paper is to present some of the key issues related to assessment of the environmental performance of buildings, supported by the proposal of strategic indicators (with reference to the tall office building), followed by a critical review of the value of environmental design. Fieldwork has shown that a group of European case-studies show signs of change beginning to emerge considering value ahead of first cost, challenging the conventional commercial model. Energy savings and environmental quality in the operation of buildings bring marketability benefits to tenants, whilst future-proofing investments are of benefit to investors. In addition, buildings need to go beyond governmental targets to be able to remain competitive, adding value to environmentally considerate design.     

Do ethnic minorities ��stretch�� their time? UK household evidence on multitasking

This paper investigates the effect of ethnicity on time spent on secondary household production, work and leisure activities employing the 2000 UK Time Use Survey. We find that, unconditionally, white females manage to “stretch” their time the most by almost four additional hours per day and non-white men “stretch” their time the least. The three secondary activities most often combined with other (primary) activities in terms of time spent on them are social activities including resting, passive leisure and childcare. Regression results indicate that non-white ethnic minorities engage less in multitasking than whites, with Pakistani and Bangladeshi males spending the least time on total secondary activities. There also exists a significant ethnicity gap for secondary housework activities and for both males and females, although females in general engage more in multitasking. The effect is heterogeneous across different sub-groups. We review several potential interpretations and discuss whether these differences in behavior may relate, among other, to opportunity costs of time, different preferences and tastes of ethnic minorities, integration experience, family composition and household productivity.     

Matrimonial circuits in kinship networks: Calculation, enumeration and census

The article presents a series of new methods for analyzing the morphology of kinship networks via the study of matrimonial circuits (closed chains of kinship and marriage ties). The article gives a simple definition of matrimonial circuits in mixed graphs and introduces the technique of representing matrimonial circuit types by characteristic vectors. This technique is used to develop (1) an arithmetic approach to the algebra of circuit composition, (2) a method for the complete enumeration of matrimonial circuit types, and (3) an algorithm for finding and counting matrimonial circuits in empirical kinship networks. All methods have been implemented in the software Puck (Program for the Use and Computation of Kinship Data).     

A procedure for optimal augmentation of multidimensional designs

The augmentation of an existing multidimensional design is discussed from the point of view of estimability of certain two-factor interactions which are nonestimable from the original design. A general procedure is proposed which achieves this with a minimal number of additional assemblies and which is optimal in a certain sense. The individual steps in this procedure are described in detail and illustrated by an example.     

Parenthood and Quality of Life in Old Age: The Role of Individual Resources,the Welfare State and the Economy

Although the notion of ‘Social Europe’ can refer to different principles and policy options, most research narrows down attitudes towards Social Europe to a unidimensional construct. In this study, we instead propose a multi-dimensional approach, and contribute to the literature in three ways. First, we elaborate the notion of ‘Social Europe’ conceptually, and distinguish between the decision-making level for social policy, European social citizenship, harmonization, member-state solidarity and interpersonal solidarity. Second, analysing the 2014 Belgian National Election Study by means of confirmatory factor analysis we evidence that citizens indeed have distinct attitudes towards the policy principles and instruments of Social Europe. Although these attitudinal dimensions are interrelated, they cannot be reduced to a single Social Europe factor, meaning that citizens differentiate in their attitudes between various aspects of Social Europe. In addition, our research indicates that member-state solidarity is the primary aspect of Social Europe in public opinion, whereas the feature that has received most scholarly attention in empirical research to date—the preferred decision-making level for social policy—cannot be considered as a key component of attitudes towards Social Europe. Third, we investigate whether citizens with different educational levels conceptualize Social Europe similarly using multigroup confirmatory factor analysis. Results indicate that the attitudinal factor structure of Social Europe is largely equivalent among lower and higher-educated citizens.     

Drug development: EU paediatric legislation,the European Medicines Agency and its Paediatric Committee—adolescents’ melanoma as a paradigm

The European Medicines Agency (EMA) website lists all diseases that officially exist in adults only. The class waiver for juvenile melanoma was revoked in 2008 referring to US SEER statistics. This statistical justification is misleading. Melanoma in adolescents is much rarer than claimed by EMA/Paediatric Committee; < 1 ∕ 4 of adolescents with melanoma need systemic treatment; separate efficacy studies are neither medically justified nor feasible. The scarce adolescent patients should be allowed to participate in adult trials. To force companies to investigate them separately turns them into paediatric hostages, to adapt the term therapeutic orphans coined in 1968 by Shirkey. There are now five melanoma Paediatric Investigation Plans (PIPs). Probably none of the PIP‐triggered clinical studies will ever be completed; we propose to call them ghost studies. An oncology research network considering a reasonable trial in melanoma, including adolescents, will compete for recruitment with the PIP‐triggered trials designed by regulatory tunnel vision and sponsored by companies under EMA‐imposed pressure. EMA/Paediatric Committee's territorial enthusiasm (“our patients”) damages oncology research. Copyright © 2014 John Wiley & Sons, Ltd.     

Inference Under Heteroskedasticity and Leveraged Data

We evaluate the finite-sample behavior of different heteros-ke-das-ticity-consistent covariance matrix estimators, under both constant and unequal error variances. We consider the estimator proposed by Halbert White (HC0), and also its variants known as HC2, HC3, and HC4; the latter was recently proposed by Cribari-Neto (2004 Cribari-Neto , F. ( 2004 ). Asymptotic inference under heteroskedasticity of unknown form . Computat. Statist. Data Anal. 45 : 215 – 233 .[Crossref], [Web of Science ®] , [Google Scholar]). We propose a new covariance matrix estimator: HC5. It is the first consistent estimator to explicitly take into account the effect that the maximal leverage has on the associated inference. Our numerical results show that quasi-t inference based on HC5 is typically more reliable than inference based on other covariance matrix estimators.