An integrated algorithm for three-way compositional data

Quality & Quantity - Compositional data with a tridimensional structure are not uncommon in social sciences. The CANDECOMP/PARAFAC model is one of the most adequate techniques for modeling...     

Buffering and bridging as environmental strategies of firms

Companies are often confronted with important strategic issues, such as environmental concerns. Generally, they react in one of two basic ways: buffering the enterprise or bridging the issue. Insight into the factors determining the choice between those two generic strategies is important for managers. Three recent and mutually related analytical frameworks from corporate communication and management theory are discussed and exemplified by the Shell Brent Spar case. This case shows the development of two generic environmental strategies over time: initial buffering of the firm from external stakeholders, and later a shift towards a bridging strategy. On the basis of our theoretical and empirical analysis, it appears that top management's attitude regarding cooperation with external stakeholders plays a key role in choosing bridging versus buffering strategies. © 1998 John Wiley & Sons, Ltd and ERP Environment.     

US HRM principles: cross-country comparisons and two case applications in India

This paper analyses the human resource management (HRM) systems of two fairly large, complex, technical organizations in India, embedded in specific external environments. The HRM practices of the two are compared with studies of practices in India and other developing countries. Further, the practices of the two organizations are compared utilizing a US HRM model. Findings are discussed with reference to relevant studies in India and the US. A complex view emerges from the analysis: (1) A mixed HRM model with US and Indian characteristics exists. (2) Differences in the two cases involve implementation and integration of HRM activities. (3) While hierarchy and paternalism are observed, adaptiveness and innovation are also evident. (4) Managerial characteristics and values (status, power, orientation) have an influential role. (5) Highlights among organizational characteristics are growth stage and professionals; and among external factors are management groups and their member interactions.     

Convergence and performance of the peeling wavelet denoising algorithm

This note is devoted to an analysis of the so-called peeling algorithm in wavelet denoising. Assuming that the wavelet coefficients of the useful signal are modeled by generalized Gaussian random variables and its noisy part by independent Gaussian variables, we compute a critical thresholding constant for the algorithm, which depends on the shape parameter of the generalized Gaussian distribution. We also quantify the optimal number of steps which have to be performed, and analyze the convergence of the algorithm. Several implementations are tested against classical wavelet denoising procedures on benchmark and simulated biological signals.     

Slack-adjusted efficiency measures and ranking of efficient units

In non-parametric methods many units are calculated as efficient. The article suggests a method for ranking efficient units, not by their efficiency, but by importance as benchmarks for the inefficient units, in contrast to earlier suggestions in the literature which rank units high if they are specialized. However, the total potentials for improvement frequently remain unrevealed by calculating radial efficiency measures of the Farrell type only. The article therefore first develops efficiency measures that explicitly extend the radial measures to include slacks. The new measures are applied to a typical multidimensional small-sample data set for Norwegian employment offices.     

Evaluación de las prácticas de trabajo decente en las empresas. Análisis de las metodologías de calificación ambiental,social y de gobernanza

Las agencias de calificación ambiental, social y de gobernanza (ASG) han adquirido una función preeminente en el ámbito de la inversión responsable como proveedoras de datos no financieros. La bibliografía anterior sobre la construcción de métricas ASG no esclarece los procedimientos de las agencias para evaluar el trabajo decente. A partir del análisis de seis agencias de calificación, los autores investigan cómo se miden y evalúan los resultados empresariales en la dimensión de trabajo decente, señalando las dificultades conexas. El objetivo es determinar en qué medida la inversión responsable y las calificaciones ASG contribuyen a promover y a mejorar el trabajo decente en las empresas.