1,721,093 research outputs found
Kragh Andersen (P.) — Statistical Models Based on Counting Processes
No full textBry Xavier. Kragh Andersen (P.) — Statistical Models Based on Counting Processes. In: Population, 52ᵉ année, n°4, 1997. pp. 1046-1049
Kragh Andersen (P.) — Statistical Models Based on Counting Processes
No full textBry Xavier. Kragh Andersen (P.) — Statistical Models Based on Counting Processes. In: Population, 52ᵉ année, n°4, 1997. pp. 1046-1049
Event history analysis of groups. The findings of an on-going research project
No full textLelièvre (Éva), Bonvalet (Catherine), Bry (Xavier). - Event history analysis of groups: initial results from an on-going research project The event history approach, which has led to a reformulation of the bases of demographic methodology in terms of analysis of complex stochastic processes (Courgeau and Lelièvre, 1989; 1996), is applied using individual longitudinal data. Ideally, however, each individual itinerary would be situated in as broad a context as possible, and the analysis of individual demographic processes would take account of the close or competing events affecting the individual's contact circle. In event history modelling, a shift from the individual to their entourage, for both data collection and analysis, implies a reconsideration of the choice of entities for longitudinal monitoring. A compromise must be reached between conceptual operationality and analytical consistency, in terms of both theory and models: this article presents the formal developments, then the more applied results from this ongoing research.Lelièvre (Éva), Bonvalet (Catherine), Bry (Xavier). - Analyse biographique des groupes. Les avancées d'une recherche en cours L'approche biographique, qui a conduit à reformuler les bases de l'analyse démographique en termes d'analyse de processus stochastiques complexes (Courgeau et Lelièvre, 1989; 1996) s'applique à des données longitudinales individuelles. De manière idéale, on aimerait pouvoir replacer chaque trajectoire dans un contexte aussi large que possible et faire une analyse des processus démographiques individuels en tenant compte des événements adjacents ou concurrents qui concernent l'entourage de l'individu. Le passage de l'individu à son entourage dans la modélisation biographique, que ce soit pour la collecte comme pour l'analyse, amène à repenser les entités suivies en longitudinal. Un compromis entre des concepts opérationnels et des analyses cohérentes est à trouver, tant du point de vue de la théorie que des modèles : nous présentons ici successivement les avancées formelles puis les résultats plus appliqués de cette recherche en cours.Lelièvre (Éva), Bonvalet (Catherine), Bry (Xavier). -Análisis biográfico de grupos. Avances de una investigación en curso El análisis biográfico, que ha conducido a la redefinición de las bases del análisis de- mográfico en términos de análisis de procesos estocásticos complejos (Courgeau y Lelièvre; 1989; 1996), se aplica a datos individuals longitudinales. Lo ideal séria poder situar cada trayectoria en un contexto amplio y realizar un análisis de los procesos demográficos individuales tomando en consideración los acontecimientos adyacentes о concurrentes que con- ciernen al entorno del individuo. El paso del individuo a su entorno en la modelización biográfica, tanto en la recopilación de datos como en el análisis, nos lleva a reflexionar de nuevo sobre los elementos tornados en consideración en el análisis longitudinal. Es necesa- rio hallar un compromiso entre la operacionalidad de los conceptos y la coherencia de los análisis, tanto desde el punto de vista de la teoria como desde el punto de vista de los mo- delos: el articulo présenta de forma sucesiva los avances formales y los resultados más apli- cados de esta investigación en curso.Lelièvre Éva, Bonvalet Catherine, Bry Xavier. Event history analysis of groups. The findings of an on-going research project. In: Population, an English selection, 10ᵉ année, n°1, 1998. New methodological approaches in the social sciences. pp. 11-38
Analyse biographique des groupes. Les avancées d'une recherche en cours
No full textLelièvre (Éva), Bonvalet (Catherine), Bry (Xavier). -Event history analysis of groups: initial results from an on-going research project The event history approach, which has led to a reformulation of the bases of demographic methodology in terms of analysis of complex stochastic processes (Courgeau and Lelièvre, 1989; 1996), is applied using individual longitudinal data. Ideally, however, each individual itinerary would be situated in as broad a context as possible, and the analysis of individual demographic processes would take account of the close or competing events affecting the individual's entourage. In event history modelling, a shift from the individual to their entourage, for both data collection and analysis, implies a reconsideration of the choice of entities for longitudinal monitoring. A compromise must be reached between conceptual operationality and analytical consistency, in terms of both theory and models: this article presents the formal developments, then the more applied results from this on-going research.Lelièvre (Éva), Bonvalet (Catherine), Bry (Xavier). - Analyse biographique des groupes. Les avancées d'une recherche en cours L'approche biographique, qui a conduit à reformuler les bases de l'analyse démographique en termes d'analyse de processus stochastiques complexes (Courgeau et Lelièvre, 1989; 1996) s'applique à des données longitudinales individuelles. De manière idéale, on aimerait pouvoir replacer chaque trajectoire dans un contexte aussi large que possible et faire une analyse des processus démographiques individuels en tenant compte des événements adjacents ou concurrents qui concernent l'entourage de l'individu. Le passage de l'individu à son entourage dans la modélisation biographique, que ce soit pour la collecte comme pour l'analyse, amène à repenser les entités suivies en longitudinal. Un compromis entre des concepts opérationnels et des analyses cohérentes est à trouver, tant du point de vue de la théorie que des modèles : nous présentons ici successivement les avancées formelles puis les résultats plus appliqués de cette recherche en cours.Lelièvre (Éva), Bonvalet (Catherine), Bry (Xavier). - Análisis biográfico de grupos. Avances de una investigación en curso El análisis biográfico, que ha conducido a la redefinición de las bases del análisis de- mográfico en términos de análisis de procesos estocásticos complejos (Courgeau y Lelièvre; 1989; 1996), se aplica a datos individuals longitudinales. Lo ideal séria poder situar cada trayectoria en un contexto amplio y realizar un análisis de los procesos demográficos indi- viduales tomando en consideración los acontecimientos adyacentes о concurrentes que con- ciernen al entorno del individuo. El paso del individuo a su entorno en la modelización biográfica, tanto en la recopilación de datos como en el análisis, nos lleva a reflexionar de nuevo sobre los elementos tornados en consideración en el análisis longitudinal. Es necesa- rio hallar un compromiso entre la operacionalidad de los conceptos y la coherencia de los análisis, tanto desde el punto de vista de la teoria como desde el punto de vista de los mo- delos: el articulo présenta de forma sucesiva los avances formales y los resultados más apli- cados de esta investigación en curso.Bry Xavier, Bonvalet Catherine, Lelièvre Éva. Analyse biographique des groupes. Les avancées d'une recherche en cours. In: Population, 52ᵉ année, n°4, 1997. pp. 803-830
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Exploring explanatory models : an event history application
No full textBry Xavier, Antoine Philippe.- Exploring the explanatory: an application to event history data This article presents an empirical plugging of factor analysis and generalized linear regression (logistic regression, Cox models, ...)■ We show that this combination can facilitate the exploration of complex data such as that on event histories (time-varying, censored) for modelling purposes. By combining a regression method with a new type of factor analysis — Thematic Components Analysis — we show how an explanatory conceptual model for the data can be included from the start of the exploratory phase. This method is then applied to an analysis of the divorce behaviour of men in Dakar, and used to give a simple illustration of each methodological point discussed.Bry Xavier, Antoine Philippe.- Explorer 1'explicatif : application à l'analyse biographique Ce travail relie de façon empirique analyses factorielles et régressions linéaires généralisées (régression logistique, de Cox, etc.). Nous montrons comment ce couplage permet de faciliter l'exploration de données complexes comme les données biographiques (variant dans le temps, incomplètement observées) en vue de leur modélisation. Nous associons une méthode de régression à une nouvelle méthode factorielle - l'analyse en composantes thématiques - qui permet de tenir compte, dès le départ, d'un modèle conceptuel explicatif des données. Cette méthode est ensuite appliquée à l'analyse du divorce des hommes à Dakar, ce qui permet d'illustrer simplement chaque point méthodologique abordé.Bry Xavier, Antoine Philippe.- Analizar las causas: aplicación al análisis biográfico En este articulo se relacionan de modo empírico análisis factoriales y regresiones linea- les generalizadas (regresión logística, de Сох, etc.). También se muestra como tal conexión facilita el análisis de datos complejos taies como los datos biográficos (que varian a través del tiempo y cuya observación es incompleta) y su modelización. Asociamos un método de regresión a un nuevo método factorial - el análisis de componentes temáticos - que permite tomar en cuenta, desde el principio, un modelo conceptual explicativo de los datos. A continuación aplicamos este método al análisis del divorcio masculino en Dakar para ilustrar de forma simple cada paso metodológico.Bry X., Antoine P. Exploring the explanatory: an application to event history data. In: Population (English edition), 59ᵉ année, n°6, 2004. pp. 795-830
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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