1,721,014 research outputs found
Two Empirical Essays in Labour Economics
Get PDFThis thesis includes two essays which empirically deal with topics in labour economics. Both chapters are co-authored with Luca Nunziata and Lorenzo Rocco, and employ data from Swiss Census, a rich dataset providing a large set of information, at individual level, on the whole population of residents in Switzerland. In the first chapter we explore the link between the propensity to engage in entrepreneurship and language, at individual level. We focus on one structural feature of languages’ grammar: the way time is encoded and, in particular, how languages differ in the syntactic expression of future events, i.e. whether they require or not the use of an explicit future marker. The heterogeneity across languages, along this dimension, may indeed affect cognitive domain and the way individuals perceive time, potentially leading to a difference in economic behaviours, especially those involving intertemporal choices. Starting from Chen (2013) linguistic-investment hypothesis, which relates the way languages’ grammar prescribes to mark future events and intertemporal decision (savings, healthy behaviours), we use data from 2000 Swiss Census in order to investigate the relationship between language and
propensity to be entrepreneur. Our baseline estimates rely on the pooled populations of natives, first and second generation immigrants. The empirical strategy employes several techniques which aim at disentangling the individual effect of language future reference from regional and cultural effects nested in linguistic affiliation. We find that, in line with the theoretical hypothesis, futureless languages speakers (Weak Future Refence) are more likely to be entrepreneur with respect to Strong Future Reference languages speakers.
In the second cahpter we analyse the impact of immigration on three labour market outcomes among native workers: the decision to be entrepreneur, the transition to high skilled occupations and the displacement from the professional sector of specialization embodied by their vocational education or training. We employ data from four waves of the complete Swiss Population Census covering the period 1970-2000 to build a panel dataset at the district level and adopt a quasi-experimental setting to deal with endogeneity of migration inflows. Our estimates show that an increase in immigration positively affects the share of native entrepreneurs, including low skilled, and leads to a higher regional share of natives in high skilled occupations. As regards sector displacement, native workers tend to move from
their sector of specialization as a response to an increase in immigration, although they tend to stay within their macro-professional sector of origin, and move less across macrosectors. Finally, we find that foreign-born inflows are correlated to natives movements to occupations with a higher degree of cognitive, communicational and analytical skills
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
Analisi dei dati del traffico marittimo per la stima delle emissioni di CO2 e del potenziale di alcalinizzazione del mare
No full textTra le tecnologie per conseguire emissioni negative di biossido di carbonio (CO2) necessarie per raggiungere gli obiettivi dell’Accordo di Parigi, numerose ricerche indicano un grande potenziale di rimozione di CO2 conseguibile grazie all’alcalinizzazione artificiale degli oceani. Tuttavia, nessuna di queste ha fino ad oggi valutato gli aspetti pratici dello scarico di grandi quantità di idrossido di calcio (calce idrata) mediante le navi. Per stimare il potenziale di scarico tramite le navi commerciali in circolazione nel Mediterraneo, sono stati elaborati i dati relativi al traffico marittimo nel 2017 provenienti dal database di EMODnet (European Marine Observation and Data Network), che fornisce la densità (ore/anno) di presenza delle navi in un grigliato 1x1 km esteso a tutto il Mar Mediterraneo. L'elaborazione ha permesso di determinare il numero di ore di navigazione effettivamente utilizzabili per lo scarico di calce idrata, avendo in precedenza eliminato dal grigliato EMODnet le celle identificate come zone in cui le navi stanno alla fonda, ossia caratterizzate da tempi di permanenza delle navi al loro interno eccessivamente elevati. Dal confronto tra i dati di EMODnet e quelli dell’IMO (International Maritime Organization) relativi alle ore di navigazione su scala globale, è stata ricavata la percentuale di traffico marittimo nel Mar Mediterraneo rispetto a quello mondiale. Tale percentuale è stata poi confrontata con il rapporto calcolato con i dati provenienti dal database EDGAR (Emission Database for Global Atmospheric Research), utilizzando le emissioni di CO2 come proxy. Il confronto ha messo in luce una sostanziale differenza tra i due risultati; una delle ragioni è che il dataset di EDGAR considera gli spostamenti delle sole navi battenti bandiera degli Stati dell’Unione Europea, mentre nel Mar Mediterraneo è presente un traffico significativo di navi battenti bandiere di stati non europe
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe 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
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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