Gumbel’s Identity,Binomial Moments,and Bonferroni Sums

Gumbel’s Identity equates the Bonferroni sum with the k ‐ th binomial moment of the number of events M_n which occur, out of n arbitrary events. We provide a unified treatment of familiar probability bounds on a union of events by Bonferroni, Galambos–Rényi, Dawson–Sankoff, and Chung–Erdös, as well as less familiar bounds by Fréchet and Gumbel, all of which are expressed in terms of Bonferroni sums, by showing that all these arise as bounds in a more general setting in terms of binomial moments of a general non‐negative integer‐valued random variable. Use of Gumbel’s Identity then gives the inequalities in familiar Bonferroni sum form. This approach simplifies existing proofs. It also allows generalization of the results of Fréchet and Gumbel to give bounds on the probability that at least t of n events occur for any A further consequence of the approach is an improvement of a recent bound of Petrov which itself generalizes the Chung–Erdös bound.     

On the inclusion of bivariate marked point processes in graphical models

Graphical models use graphs to represent conditional independence relationships among random variables of a multivariate probability distribution. This paper introduces a new kind of chain graph models in which nodes also represent marked point processes. This is relevant to the analysis of event history data, i.e. data consisting of random sequences of events or time durations of states. Survival analysis and duration models are particular cases. This article considers the case of two marked point processes. The idea consists of representing a whole process by a single node and a conditional independence statement by a lack of connection. We refer to the resulting models as graphical duration models.     

On the Analysis of Large Numbers of p‐values

Methods for the analysis of large numbers of p‐values, observed levels of significance, are reviewed with some emphasis placed on the Rényi decomposition hinging on the relation with independent exponentially distributed random variables. Some extensions are described. An empirical example is used in illustration, and simulation results examining potential complications are outlined.     

Information visualisation based on graph models

Information visualisation is a key component of support tools for many applications in science and engineering. A graph is an abstract structure that is widely used to model information for its visualisation. In this paper, we consider practical and general graph formalism called hierarchical graphs and present the Higres and Visual Graph systems aimed at supporting information visualisation on the base of hierarchical graph models.     

Applied Spatial Econometrics: Raising the Bar

Abstract

This paper places the key issues and implications of the new ‘introductory’ book on spatial econometrics by James LeSage & Kelley Pace (2009) in a broader perspective: the argument in favour of the spatial Durbin model, the use of indirect effects as a more valid basis for testing whether spatial spillovers are significant, the use of Bayesian posterior model probabilities to determine which spatial weights matrix best describes the data, and the book's contribution to the literature on spatio-temporal models. The main conclusion is that the state of the art of applied spatial econometrics has taken a step change with the publication of this book.

Relever le niveau de l'économetrie spatial appliquée

RÉSUMÉ La présente communication place les principales questions et implications du nouvel ouvrage d'introduction sur l'économétries spatiale de James LeSage & Kelley Pace (2009) dans un contexte plus général: l'argument favorisant le modèle spatial de Durbin, l'emploi d'effets indirects comme base plus valable pour évaluer l'aspect significatif des déversements spatiaux, l'emploi des probabilités d'un modèle baysien postérieur pour évaluer laquelle des matrices de poids spatiaux décrit le mieux les donnes, et la contribution de l'ouvrage la documentation sur les modèles spatio-temporels. La principale conclusion est qu'avec la publication de cet ouvrage, l'état de l'art de l'économétries spatiale applique a effectué un grand pas en avant.

Alzar el nivel de la econometría espacial aplicada

RÉSUMÉ Este trabajo plantea las cuestiones e implicaciones clave del nuevo libro introductorio sobre económetra espacial de James LeSage & Kelley Pace (2009) dentro de una perspectiva más amplia: el argumento a favor del modelo espacial Durbin, el uso de efectos indirectos como una base más válida para poner a prueba si los desbordamientos espaciales son significativos, el uso de probabilidades posteriores bayesianas para descubrir que matriz de pesos espaciales describe mejor los datos, y la contribución del libro a la bibliógrafa sobre modelos espaciotemporales. La principal conclusión es que la econometría espacial aplicada más avanzada ha experimentado un cambio radical con la publicación de este libro.

     

The impact of mentoring quality on protégés' organization‐based self‐esteem and proactive behavior: The moderating role of traditionality

Based on self‐consistency theory, this study examined the relationship between mentoring quality as perceived by protégés and protégés' proactive behavior. It focused on the mediating role of organization‐based self‐esteem (OBSE) and the moderating role of traditionality. To examine these relationships, we administrated three‐wave surveys to 237 subordinate–supervisor dyads in a construction enterprise. The results of hierarchical linear modeling demonstrated that (a) mentoring quality and proactive behavior had a positive relationship; (b) OBSE mediated this relationship; and (c) traditionality strengthened both the relationship between mentoring quality and OBSE and the indirect effect of mentoring quality on proactive behavior via OBSE. Our findings have theoretical and practical implications for research on mentoring and proactive behavior.     

A Dynamic Origin-constrained Spatial Interaction Model Applied to Poland's Inter-provincial Migration

Abstract

In contemporary Europe migratory processes are becoming inceasingly important, given the diminishing impact of natural changes on population dynamics. In this paper, we focus on some determinants of internal migration in Poland. The choice of variables is guided by recent considerations about interregional migration in other transitional economies. The quantitative analysis of Polish migration flows has been performed by considering migration interactions over time. A dynamic version of an origin-constrained spatial interaction model is proposed. This approach relies on using the method of offsets, generalizing the Poisson regression framework, and applied to the calibration of spatial interaction models.

Modèle dynamique d'interactions spatiales limitées par l'origine, appliqué aux migrations interprovinciales en Pologne

RÉSUMÉ Dans l'Europe contemporaine, les processus migratoires acquièrent une importance toujours majeure, compte tenu de la réduction de l'impact des changements naturels sur la dynamique de la population. Dans la présente communication, nous nous concentrons sur certains facteurs déterminants de la migration interne en Pologne. Le choix des variables est déterminé par de récentes considérations concernant les migrations interrégionales dans d'autres économies transitionnelles. On procède à l'analyse quantitative des flux migratoires polonais, en examinant des interactions migratoires progressives. On propose une version dynamique d'un modèle d'interaction spatiale limité par l'origine: ce principe est basé sur l'utilisation de la méthode d'offsets, généralisant le cadre de régression de Poisson, et appliqué au calibrage de modèles d'interaction spatiale.

Modelo dinámico de interacción espacial restringido por origen aplicado a la emigración interprovincial de Polonia

RÉSUMÉ En la Europa contemporánea, los procesos migratorios son cada vez más importantes debido al decreciente impacto de los cambios naturales sobre la dinámica de la población. En este trabajo, nos centramos en algunos de los determinantes de la emigración interna en Polonia. La elección de variables se guía por consideraciones recientes sobre la emigración interregional en otras economías transicionales. El análisis cuantitativo de los flujos polacos de emigración se ha realizado considerando las interacciones de emigración a través del tiempo. Se propone una versión dinámica de un modelo de interacción espacial restringido por origen. Este planteamiento se basa en el empleo del método de compensaciones (method of offsets), generalizando el marco de regresión Poisson, y aplicándolo a la calibración de modelos de interacción espacial.

     

Integration of Spatial Correlation into a Combined Travel Model with Hierarchical Levels

Abstract

A combined travel model incorporating spatial correlation is derived from the optimality conditions of a multi-objective optimization framework, in which the trip generation and distribution steps are expressed as hierarchical logit functions. Different forms of spatial correlation are shown to be easily accommodated in combined models using hierarchical logit structures. An extension incorporates spatial correlation into combined models enabling analyses of the impacts of urban development policies on transportation systems as well as the effects of transportation projects on trip generation. A principal finding is that integration of spatial correlation into travel models significantly improves their explanatory power and forecasting abilities; indeed, its exclusion may lead to biased parameter estimates.

RÉSUMÉ Un modèle sur des déplacements mixtes, comprenant une corrélation spatiale, est dérivé des conditions d'optimalité d'un cadre d'optimisation multi-objectifs, dans lesquelles la production du voyage et les mesures de distribution sont exprimées sous forme de fonctions logit hiérarchiques. On démontre que différentes formes de corrélation spatiales sont facilement incorporées dans des modèles mixtes, en permettant l'exécution d'analyses des impacts de politiques de développement urbain sur les systèmes de transport, ainsi que les effets de projets de transport sur la génération d'un déplacement. Une des principales conclusions est que l'intégration d'une corrélation spatiale dans des modèles de déplacement renforce de façon significative leur pouvoir explicatif et leurs capacités de prévision, et son exclusion peut même porter à des estimations paramétriques faussées.

EXTRACTO Un modelo combinado de viajes que incorpora correlación espacial se deriva de las condiciones de optimalidad de un marco de optimización de objetivos múltiples, en el que los pasos de generación y distribución de viajes se expresan como funciones logit jerárquicas. Se muestra que diferentes formas de correlación espacial son fácilmente acomodadas en modelos combinados utilizando estructuras logit jerárquicas. Una extensión incorpora correlación espacial en modelos combinados, permitiendo el análisis del impacto de las políticas de desarrollo urbano sobre los sistemas de transporte, así como de los efectos de los proyectos de transporte sobre la generación de viajes. Un hallazgo importante es que la integración de correlación espacial en modelos de viaje mejora significativamente su poder explicativo y habilidades de pronóstico; de hecho, su exclusión podría producir estimaciones parciales de parámetros.

摘要:

本文从多目标优化系统的最优化条件中得到了一种包含空间相关性的复合旅行交通模型, 其中旅行线路生成和行程规划作为分层logit函数。使用分层logit结构 ' 复

合模型可以轻松提供不同形式的空间相关性 。将复合模型进行拓展 ' 融入空间相

关性后 ' 分析城市发展政策对交通系统的影响以及交通工程对旅行线路的效果成为可能 。一个基本结论是 ' 将空间相关性纳入旅行交通模型能够大大提高模型的解释功能和预测能力 ; 的确 ' 不考虑空间相关性可能会造成参数估计偏差 。     

An information theoretical algorithm for analyzing supersaturated designs for a binary response

A supersaturated design is a factorial design in which the number of effects to be estimated is greater than the number of runs. It is used in many experiments, for screening purpose, i.e., for studying a large number of factors and identifying the active ones. In this paper, we propose a method for screening out the important factors from a large set of potentially active variables through the symmetrical uncertainty measure combined with the information gain measure. We develop an information theoretical analysis method by using Shannon and some other entropy measures such as Rényi entropy, Havrda–Charvát entropy, and Tsallis entropy, on data and assuming generalized linear models for a Bernoulli response. This method is quite advantageous as it enables us to use supersaturated designs for analyzing data on generalized linear models. Empirical study demonstrates that this method performs well giving low Type I and Type II error rates for any entropy measure we use. Moreover, the proposed method is more efficient when compared to the existing ROC methodology of identifying the significant factors for a dichotomous response in terms of error rates.     

Testing for Cross-sectional Dependence in Regional Panel Data

Abstract

We examine three tests of cross-sectional dependence and apply them to a Danish regional panel dataset with few time periods and a large cross-section: the CD test due to Pesaran (2004), the Schott test and the Liu–Lin–Shao test. We show that the CD test and the Schott test have good properties in a Monte Carlo study. When controlling for panel-specific and time-specific fixed effects, the Schott test is superior. Our application shows that there is cross-sectional dependence in regional employment growth across Danish regions. We also show that this dependence can be accounted for by time-specific fixed effects. Thus, the tests uncover new properties of the regional data.

RÉSUMÉ Nous examinons trois tests d'autonomie transversale, que nous appliquons à des ensembles de données d'une commission régionale danoise, avec peu de plages de temps et un vaste échantillons: le test d'autonomie transversale mené par Pesaran (2004), le test de Schott et le test Liu–Lin–Shao. Nous démontronsque le test d'autonomie transversale et le test de Schott présentent de bonnes propriétés dans uneétude Monte Carlo. Lorsquel'on se penchesur les effets propres au panel et les effets fixes en fonction du temps, le test de Schott dépasse les autres. Notre application illustre le dépendance transversale dans l'expansion de l'emploi à l’échelon régional dans les régions danoises, et nous démontronsque cette dépendance peut s'expliquer par des effets fixes en fonction du temps. De cette façon, le test révèle des propriétés nouvelles des données régionales.

RESUMEN Examinamos tres pruebas de dependencia transversal y las aplicamos a un conjunto de datos de panel regional en Dinamarca con pocos períodos de tiempo y una gran sección transversal: la prueba CD de Pesaran (2004), la prueba Schott y la prueba Liu–Lin–Shao. Demostramos que la prueba CD y la prueba Schott poseen buenas propiedades en un estudio de Monte Carlo. Al controlar los efectos fijos específicos de panel y específicos de tiempo, la prueba Schott es superior. Nuestra aplicación demuestra que existe una dependencia transversal en el crecimiento del empleo regional a través de las regiones danesas. Asimismo, demostramos que esta dependencia puede ser explicada mediante los efectos fijos específicos de tiempo. Por lo tanto, las pruebas dejan al descubierto nuevas propiedades de los datos regionales.

     

Social,Economic and Civil Vulnerability in the United States,France and Brazil

This article analyzes the evolution of the debate on socio‐economic vulnerability, both in the United States and France, as well as commenting on the contemporary situation in Brazil. In the US study, which draws on the concept of ‘underclass’, the debate is openly political‐ideological — blaming the victims (or not) for their marginalization and anomie — which has made some authors regard the so‐called ‘well‐being programs’ as responsible for promoting a culture of dependency and family breakdown. In the French study, by contrast and following the republican tradition, both the diagnoses and proposals emphasize the need for a strong state presence to provide a means of reinserting the marginalized groups. The article doesn’t attempt a critical evaluation of the literature, but making use of seminal works it aims to show that the parameters of the theoretical and empirical problem depend on the particularities of each national political ambience. The final section on Brazilian society focuses on the marginality‐dependency debate of the 1970s and on what can be termed a process of disenfranchisement that affects the urban poor. Final comments are made concerning the matrix of extreme inequalities characterizing Brazilian society vis‐à‐vis the French and American cases. Cet article analyse l’évolution du débat sur la vulnérabilité socio‐économique, tant aux Etats‐Unis qu’en France, puis commente la situation brésilienne contemporaine. La partie américaine de l’étude, basée sur le concept de ‘quart‐monde’, présente un débat délibérément politico‐idéologique qui reproche aux victimes (ou non) leur marginalisation et leur anomie; selon certains auteurs, les programmes dits de ‘bien‐être’ portent la responsabilité d’encourager une culture de dépendance et de décomposition familiale. Dans la partie française, au contraire et en toute tradition républicaine, diagnostics et propositions soulignent le besoin d’une forte présence étatique comme moyen de réinsérer les groupes marginalisés. Sans se livrer à une revue de la littérature disponible, l’article exploite les travaux influents pour montrer que les paramètres de la problématique théorique et empirique dépendent des spécificités de chaque environnement politique national. La dernière partie, sur la société brésilienne, se consacre au débat marginalité/dépendance des années 1970 et à ce qu’on peut appeler un processus de désaffranchissement qui touche les pauvres des villes. La conclusion commente le nid d’extrêmes inégalités qui caractérise la société brésilienne par rapport à la France et aux Etats‐Unis.     

BOOK REVIEWS

Book reviewed in this article: Amit-Talai, Vered and Henri Lustiger-Thaler (eds.) 1994: Urban lives: fragmentation and resistance. Morton Suzanne 1995: Ideal surroundings, domestic life in a working-class suburb in the 1920's. Hay den, Dolores 1995: The power of place: urban landscapes as public history. Rémy, Jean (ed.) 1995: Georg Simmel: ville et modernité. Bennani-Chraïbi, Mounia 1994: Soumis et rebelles: les jeunes au Maroc. Stébé, Jean-Marc 1995: La réhabilitation de l'habitat social en France.     

Developmental network structure and support: gendered consequences for work–family strain and work–parenting strain in the Australian mining industry

Developmental networks enhance career success through the support received by the protégé via the network structure. This paper extends developmental network research by exploring the extent to which strain is associated with developmental network structure and support in the Australian mining industry, a highly volatile and unique context. Our research tests the popular notion of ‘the more support you get, the better’ which is in need of further exploration in the developmental networks literature particularly in specific work contexts with strain (vs. success variables) as outcomes. Results indicate that bigger, broader networks with more career, psychosocial and role modelling support are not always beneficial for protégés in this context. A smaller network with a broader range of developers is associated with reduced work–parenting strain, but not work–family strain. Increased career support reduced work–family strain, but this was not the case for increased psychosocial support and role modelling support. Further, gender moderated the relationship between psychosocial support and work–family strain possibly due to token group effects.     

Developing and Utilizing Network Resources: Roles of Political Skill

This study examines the role of political skill in the development and utilization of network resources at the individual level. Drawing on the behavioural and network perspectives as well as political skill literature, we propose that political skill increases one's network resources (developing network), which will benefit his/her performance and career success. Moreover, political skill is hypothesized to strengthen the relationships between network resources and performance and career outcomes (utilizing network). A two‐wave study on a sample of 281 supervisor–subordinate dyads from six electronic firms in China confirms our hypotheses. Our examination of the dual role of political skill facilitates a better understanding of the networking process from the perspective of individual skill/behaviour, thus enriching the behavioural theory and network literature. Implications are discussed and directions for future research are suggested.     

Cultural Districts,Property Rights and Sustainable Economic Growth

The purpose of this article is to analyse the economic properties as well as the institutions governing the start‐up and evolution of cultural districts. The first part of the article reviews the relationships between culture, viewed as an idiosyncratic good, and the theory of industrial districts. The second part comprises a critical discussion of four models of cultural districts: the industrial cultural district (mainly based on positive externalities, localized culture and traditions in ‘arts and crafts’); the institutional cultural district (chiefly relying on the assignment of property rights); the museums cultural district (based on network externalities and the search for optimal size); and the metropolitan cultural district (based on communication technologies, performing arts and electronic trade). The assignment of intellectual property rights to local idiosyncratic cultural goods seems to be the most significant way to differentiate among cultural districts. The final section discusses a possible convergence of all district models towards the institutional district, based on the creation of a system of property rights as a means to protect localized production. Cet article tente d’analyser les propriétés économiques et les institutions qui régissent la création et l’évolution de districts culturels. La première partie étudie les relations entre la culture – vue comme un bien idiosyncrasique – et la théorie des districts industriels. La deuxième partie est un débat critique sur quatre modèles de districts culturels: le district culturel industriel (basé essentiellement sur des externalités positives, des cultures et traditions artisanales locales), le district culturel institutionnel (s’appuyant principalement sur l’attribution de droits de propriété), le district culturel des musées (fondé sur des effets d’entraînement en réseau et la recherche d’une taille optimale), et le district culturel métropolitain (basé sur les technologies de communication, des représentations artistiques et le commerce électronique). L’attribution de droits de propriété intellectuelle sur des biens culturels idiosyncrasiques locaux semble être la meilleure manière de différencier les districts culturels. La dernière partie de l’article examine une convergence possible de tous les modèles de district vers le district institutionnel, en s’appuyant sur la création d’un système de droits de propriété comme moyen de protection d’une production locale.     

The interactive effects of leader–member exchange,gender and spouse's gender role orientation on work interference with family conflict

Based on social support and gender role theories, we examined the direct and interactive effects of leader–member exchange, gender and spouse's gender role orientation on work–family conflict. Survey data were collected from matched dyads from 185 dual-earner couples in Sri Lanka. The results show that leader–member exchange is negatively related to work interference with family. There is also support for crossover effects among couples such that individuals with spouses who have a traditional gender role orientation experience greater work interference with family conflict. Finally, there is a three-way interaction such that a spouse's gender role orientation moderates the relationship between leader–member exchange and work interference with family conflict differently for men and women.     

Why Do I Feel Valued and Why Do I Contribute? A Relational Approach to Employee's Organization‐Based Self‐Esteem and Job Performance

Drawing on the relational perspective and self‐consistency theory, we theorize how relationships involving work‐centric, off‐work‐centric, and/or personal components can affect an employee's organization‐based self‐esteem and job performance in Chinese organizational contexts. Matched data were collected from a multi‐source sample that included 219 employee–supervisor dyads from a Chinese bank. Results based on hierarchical regression analyses reveal that a high‐quality relationship with a supervisor through work and off‐work domains (leader–member exchange and guanxi) is positively related to organization‐based self‐esteem. Organization‐based self‐esteem plays a mediating role in the relationship between guanxi and job performance. Additionally, career mentoring from a supervisor (a work‐centric relationship involving personal components) moderates the relationship between organization‐based self‐esteem and job performance.     

Regression analysis and dependence

In this paper we study the relationship between regression analysis and a multivariate dependency measure. If the general regression model Y=f() holds for some function f, where 1i₁< i₂<···i_m k, and X₁,...,X_k is a set of possible explanatory random variables for Y. Then there exists a dependency relation between the random variable Y and the random vector (). Using the dependency statistic defined below, we can detect such dependency even if the function f is not linear. We present several examples with real and simulated data to illustrate this assertion. We also present a way to select the appropriate subset among the random variables X₁,X₂,...,X_k, which better explain Y.     

NONPARAMETRIC AND SEMIPARAMETRIC PANEL DATA MODELS: RECENT DEVELOPMENTS

In this paper, we provide an intensive review of the recent developments for semiparametric and fully nonparametric panel data models that are linearly separable in the innovation and the individual-specific term. We analyze these developments under two alternative model specifications: fixed and random effects panel data models. More precisely, in the random effects setting, we focus our attention in the analysis of some efficiency issues that have to do with the so-called working independence condition. This assumption is introduced when estimating the asymptotic variance–covariance matrix of nonparametric estimators. In the fixed effects setting, to cope with the so-called incidental parameters problem, we consider two different estimation approaches: profiling techniques and differencing methods. Furthermore, we are also interested in the endogeneity problem and how instrumental variables are used in this context. In addition, for practitioners, we also show different ways of avoiding the so-called curse of dimensionality problem in pure nonparametric models. In this way, semiparametric and additive models appear as a solution when the number of explanatory variables is large.     

Copula Gaussian graphical models with penalized ascent Monte Carlo EM algorithm

Typical data that arise from surveys, experiments, and observational studies include continuous and discrete variables. In this article, we study the interdependence among a mixed (continuous, count, ordered categorical, and binary) set of variables via graphical models. We propose an ?₁‐penalized extended rank likelihood with an ascent Monte Carlo expectation maximization approach for the copula Gaussian graphical models and establish near conditional independence relations and zero elements of a precision matrix. In particular, we focus on high‐dimensional inference where the number of observations are in the same order or less than the number of variables under consideration. To illustrate how to infer networks for mixed variables through conditional independence, we consider two datasets: one in the area of sports and the other concerning breast cancer.