1,721,094 research outputs found
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
Formal and Informal Volunteering and Health in Mediterranean Europe
No full textIn this paper, we compare the correlation among formal and informal volunteering and self-perceived health across Mediterranean European countries after controlling for socio-economic characteristics, housing features, neighborhood quality, size of municipality, social and cultural participation and regional dummies. We find that informal volunteering has a significant, positive correlation with self-perceived health in France, Spain, Greece and a significant, negative relationship in Italy
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
Private monetary transfers and altruism: an Empirical investigation on Italian families
Full text linkThe aim of this paper is to explore the motivation of monetary transfers received by Italian household heads. The financial transfers may be motivated by altruism or by the expectation of future services. For this reason, we select a sample of Italian families from the 2006 European Union Statistics on Income and Living Conditions (EU-SILC) dataset. First, we consider the transfer decision and try to account for the factors that affect the probability that the household head will receive a transfer. Next, we restrict our analysis to those families who did receive a positive transfer and examine the factors that affect the size of the transfer. The positive relationship between recipient’s income and transfer amount received is consistent with exchange theory: recipients with higher income ask for higher payments in exchange for services provided. We also explore the relationship between private and public financial transfers. In particular, we choose Italy for its peculiar institutional features. The results imply that the hypothesis about a crowding-out process cannot be rejected. The main contribution of the paper to the existing literature is to investigate the social motivation of private transfers and their implications in terms of policy in a unified framework
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
Bottom-Up Generation of Water Demands to Preserve Basic Statistics and Rank Cross-Correlations of Measured Time Series
No full textThis paper presents a novel methodology for the generation of demand time series at water distribution network (WDN) users. After subdividing the day into an integer number of time steps with order of magnitude of 1 h, the methodology is based on two phases. First, it generates, for each user and for each time step of the day, demand time series of the first attempt, which are consistent with the measured time series in terms of mean, standard deviation, and skewness. This is done with a beta probability distribution with tunable bounds or with a gamma distribution with shift parameter. In the refinement phase, rank cross-correlations between users and at all temporal lags are imposed on the generated demand time series through a single Copula-based re-sort. The effectiveness of the methodology is proven in two real case studies with different numbers of users - namely, the literature case study of Milford, Ohio, and a novel Italian site. The demand time series obtained from the spatial aggregation of the generated user demand time series preserves very well mean and standard deviation of the measured aggregated demand time series. The preservation of skewness and temporal cross-correlations at all lags is very satisfactory. A procedure is also presented to reconcile the generated demand time series with demand pulses generated at fine time step, thus enabling reconstruction of demand at any time step
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
Why without pay? The Intrinsic Motivation between Investment and Consumption in Unpaid Labour Supply
No full textThis paper provides a theoretical model and an empirical investigation on unpaid labour regularly supplied in non profit organisations. The contribution is threefold. First, intrinsic motivation in unpaid labour supply is considered, taking into account simultaneity between investment and consumption motives. Second, we study the impact of family care responsibilities on the determination of unpaid labour supply. Third, the specific activity a person is engaged in is shown to have a significant relevance. Empirical analysis, on data from Indagine Multiscopo sulle Famiglie, Aspetti della Vita Quotidiana, 1997, shows that frequently supplied unpaid labour depends on intrinsic motivation, income, age, family responsibilities and the specific task carried out in non profit organisations. The analytical framework suggests that these determinants support the hypothesis that both investment and consumption motives interact in shaping unpaid labour supply, with a stronger impact of consumption purpose
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