1,721,637 research outputs found
Dinamiche settoriali della produttività e dell’intensità di investimento. Un confronto tra Germania Federale, Italia e Regno Unito: 1970-1992
No full textIn questo lavoro verranno esaminati i processi di crescita che hanno caratterizzato i settori manifatturieri in tre paesi a differente modello di capitalismo, quali specificamente Germania Federale, Italia e Regno Unito negli ultimi venti anni. In particolare verranno confrontati i tassi di variazione della produttività registrati nel periodo con quelli relativi all'intensità di capitale per occupato, nel tentativo di evidenziare l'esistenza o meno di sentieri di crescita e sentieri di sviluppo riconducibili a specifici modelli teorici. Dal confronto tra le variabili si potranno avere informazioni sul tipo di processo di crescita evidenziato dai settori, individuandone modalità di tipo tradizionale (neoclassico o kaldoriano) o di tipo innovativo (schumpeteriano e neo-schumpeteriano).
La fonte statistica utilizzata è costituita dal database “STAN for Industrial Analysis” realizzato dall'OCSE e contenente dati relativi ai diversi settori che compongono l'aggregato industria manifatturiera nel periodo 1970 al 1992. L'analisi è stata realizzata aggregando in gruppi omogenei i diversi comparti a seconda di particolari criteri intesi a catturare alcune caratterizzazioni dei singoli settori
Identifying the Brownian covariation from the co-jumps given discrete observations
No full textWhen the covariance between the risk factors of asset prices is due to both Brownian and jump components, the realized covariation (RC) approaches the sum of the integrated covariation (IC) with the sum of the co-jumps, as the observation frequency increases to infinity, in a finite and fixed time horizon. In this paper the two components are consistently separately estimated within a semimartingale framework with possibly infinite activity jumps. The threshold (or truncated) estimator is used, which substantially excludes from RC all terms containing jumps. Unlike in Jacod (2007, Universite de Paris-6) and Jacod (2008, Stochastic Processes and Their Applications 118, 517–559), no assumptions on the volatilities’ dynamics are required. In the presence of only finite activity jumps: 1) central limit theorems (CLTs) for and for further measures of dependence between the two Brownian parts are obtained; the estimation error asymptotic variance is shown to be smaller than for the alternative estimators of IC in the literature; 2) by also selecting the observations as in Hayashi and Yoshida (2005, Bernoulli 11, 359–379), robustness to nonsynchronous data is obtained. The proposed estimators are shown to have good finite sample performances in Monte Carlo simulations even with an observation frequency low enough to make microstructure noises’ impact on data negligible
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
Modello di trasporto degli inquinanti nei tratti metropolitani dei fiumi Tevere e Aniene
No full textThe role of the Corbara Reservoir on the Tiber River in the flood protection of the Town of Rome, Italy
No full textAppropriate 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
Regimi di crescita e dinamiche dell’occupazione nell’industria manifatturiera. Un confronto tra Germania Federale, Italia, Regno Unito: 1970-1992
No full textRegimi di crescita e dinamiche dell’occupazione nell’industria manifatturiera. Un confronto tra Germania Federale, Italia, Regno Unito: 1970-199
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