1,720,958 research outputs found
Stay or leave Ethiopia: analysing migration as households’ two-stage decision
No full textThis study analyses the main determinants of migration in order to guide future policy interventions in Ethiopia. We use a double-hurdle model for observing a sample of 4,946 households by a representative survey data. The findings show that the likelihood of migration mainly depends on socio-economic factors while not affected by regional origin. The determinants related to household heads and members have strong impacts, thus confirming that the decision is driven by these actors instead of being a purely individual choice. In addition, the findings confirm that migration is mainly linked to rural areas. Educational policies have a decisive impact on the household choice to let someone migrate. Literacy is the strongest determinant of migration choice, with the highest impact; agricultural policies have a smaller impact on the decision to migrate rather than other policies have
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
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
Evaluating industrial sustainability in OECD countries: A cross-country comparison
Full text linkThe negative impacts associated to industrial activities have lead policymakers and scholars to elaborate broad interventions for sustainable and circular growth. These strategies entail the participation of a multitude of actors, each of whom is responsible for the achievement of different industrial sustainability and circular economy targets. A successful implementation of these strategies must be based on robust measurement systems, evaluating both policy implementation process and its outcomes. With this purpose, the aim of this paper is to present a novel approach for industrial sector performance, with respect to sustainability and circular economy. In doing so, by exploiting an OECD procedure, we built an Industrial Sustainability Index and four sub-indices evaluating different aspects of industrial sustainability and circular economy interventions: inputs, firm activities, outputs and resource efficiency outcomes. Furthermore, a scenario based on a Disparity Index has been used to evaluate the distance of each statistical observation from an efficient solution. This methodology has been tested on 36 OECD countries. The proposed approach allows policymakers to easily identify both weaknesses and best practices of the whole system and, thus, balance policy interventions according to the punctual needing of sectors, aspects or actors
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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