1,721,047 research outputs found
Integrazione delle tecniche nella comunicazione dei dati
No full textIntegrazione delle tecniche nella comunicazione dei dat
Public Good Provision with Convex Costs
Full text linkThis paper considers a model of voluntary public good provision with two players and convex costs. I demonstrate that the provision of public good is higher in the sequential framework under fairly general conditions. This outcome shows that introducing convex costs may reverse under some condition the results of Varian ( 1994).Public Goods, Contribution Games, Private Provision of Public Goods
Open access and journal ranking. First considerations
Full text linkThe aim of the article is to give a first overall view of the position, score and/or rank of the "non bibliometric" journals in the ANVUR list of the "08 Architettura" area, with regard to the "Arts and Humanities" themes that are present in all the databases examined, in order to table the sampled journals in a summary framework - among the various methods of evaluation of the research -. An attempt has been made to compare the most frequent databases in order to obtain a hierarchy of reference, in an attempt to identify how the journals Open Acces are placed in the panorama under examination
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
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
The Future of Pharmaceuticals Industry within the Triad: The Role of Knowledge Spillovers in Innovation Process
No full textThe purpose of this paper is to investigate the role of knowledge spillovers on productivity returns pharmaceutical leading firms. The analysis is based upon a dataset (sourced from the EU R&D investment scoreboards) made of R&D-intensive pharmaceuticals firms. In particular, we quantify the impact of R&D spillovers on the total factor productivity (TFP) between 2002 and 2010 on the basis of technological proximity. Thus, we elaborate more future scenarios to know what will happen, what can happen and how a predefined target may be obtained. Indeed, a numerical analysis for prediction of scenarios was conducted using the Method of Least Squares. The technological relatedness between the firms is computed through an original Mahalanobis industry weight matrix, based on the construction of technological vectors for each firm (Aldieri, 2013; Jaffe, 1986). The results confirmed the leadership of Europe and the USA in the pharmaceutical sector, highlighting the innovative capacity of Pfizer. The results might be interpreted to provide some useful implications for pharmaceutical policy strategy given that mainly in the pharmaceutical industry the private sector innovations derive from public-sector research investments
The BOSS bispectrum analysis at one loop from the Effective Field Theory of Large-Scale Structure
No full textWe analyze the BOSS power spectrum monopole and quadrupole, and the bispectrum monopole and quadrupole data, using the predictions from the Effective Field Theory of Large-Scale Structure (EFTofLSS). Specifically, we use the one loop prediction for the power spectrum and the bispectrum monopole, and the tree level for the bispectrum quadrupole. After validating our pipeline against numerical simulations as well as checking for several internal consistencies, we apply it to the observational data. We find that analyzing the bispectrum monopole to higher wavenumbers thanks to the one-loop prediction, as well as the addition of the tree-level quadrupole, significantly reduces the error bars with respect to our original analysis of the power spectrum at one loop and bispectrum monopole at tree level. After fixing the spectral tilt to Planck preferred value and using a Big Bang Nucleosynthesis prior, we measure σ 8 = 0.794 ± 0.037, h = 0.692 ± 0.011, and Ωm = 0.311 ± 0.010 to about 4.7%, 1.6%, and 3.2%, at 68% CL, respectively. This represents an error bar reduction with respect to the power spectrum-only analysis of about 30%, 18%, and 13% respectively. Remarkably, the results are compatible with the ones obtained with a power-spectrum-only analysis, showing the power of the EFTofLSS in simultaneously predicting several observables. We find no tension with Planck
Taming redshift-space distortion effects in the EFTofLSS and its application to data
No full textFormer analyses of the BOSS data using the Effective Field Theory of Large-Scale Structure (EFTofLSS) have measured that the largest counterterms are the redshift-space distortion ones. This allows us to adjust the power-counting rules of the theory, and to explicitly identify that the leading next-order terms have a specific dependence on the cosine of the angle between the line-of-sight and the wavenumber of the observable, μ. Such a specific μ-dependence allows us to construct a linear combination of the data multipoles, P̸, where these contributions are effectively projected out, so that EFTofLSS predictions for P̸ have a much smaller theoretical error and so a much higher k-reach. The remaining data are organized in wedges in μ space, have a μ-dependent k-reach because they are not equally affected by the leading next-order contributions, and therefore can have a higher k-reach than the multipoles. Furthermore, by explicitly including the highest next-order terms, we define a `one-loop+' procedure, where the wedges have even higher k-reach. We study the effectiveness of these two procedures on several sets of simulations and on the BOSS data. The resulting analysis has identical computational cost as the multipole-based one, but leads to an improvement on the determination of some of the cosmological parameters that ranges from 10% to 100%, depending on the survey properties
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