1,720,993 research outputs found
Generically distributed investments on flexible projects and endogenous growth
Full text linkIn this paper we study an endogenous growth model where investments are (generically) distributed over multi-period flexible projects leading to new capital once completed. Recently developed techniques in dynamic programming are adapted and used to unveil the global dynamics of this model. Based on this analytical ground, several numerical exercises are performed to show the quantitative relevance of the analytical findings with an emphasis on the relation between project features and economic growth and speed of convergence toward the balanced growth path. © 2015 The Author(s
Internal habits formation and optimality
Full text linkIn a very influential model with internal habits, Carroll et al., (2017, 2000), establish that an increase in economic growth may cause a positive change in savings. The optimality of this result, and of many other contributions using a similar framework, has been questioned by some authors who have observed that the parametrization used in these models always implies a utility function not jointly concave in consumption and habits. In this paper, we revisit the optimality issue and, using advanced techniques in Dynamic Programming, we answer the following long-standing open questions: (i) Is the solution found in Carroll et al., (2017, 2000) optimal? (ii) Is it also unique or do other optimal solutions exist
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
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
Between Permanence and Transformation: ‘Sacred’ Routes in Sorrento-Amalfi Peninsula
No full textThe Sorrento-Amalfi Peninsula is characterized by a delicate equilibrium between natural and human traces, permanence and transformation in which each of the components – stratified during centuries – represents an essential part of the whole.
Considering the evolution of the religion from Pagan to Christian cult and the consequent adaptation of places and structures of worship, in a context like this, despite the overlap of material and immaterial stratifications, it is possible to identify the persistence of traditions and uses in a sort of religious syncretism that connects rituals of the past to contemporary ones. In contrast to the primitive cult of the Sirens – mythical creatures described by Homer in the Odyssey – only recalled by literary resources, the ancient cults dedicated to Athena and to Apollo appear to be testified by material evidences. In both cases, in fact, the sources refer to the presence of two places of worship which were connected to the inland by paths used during centuries by pilgrims to reach them. These ‘pilgrimages’ routes retain still today their spiritual vocation, conserving it through the tangible presence of ancient traces or the intangible continuity in traditions and uses.
Therefore, in the landscape of the Sorrento-Amalfi Peninsula, the communication paths, as in the ancient forms, as in their modern stratifications, constitute a fundamental component of the multi-stratified palimpsest. Within this ancient system the ‘sacred’ routes assume a role of great importance: they testify the remarkable religious tension that has always characterized these places, the continuity in their ‘spiritual’ use, as well as, the presence of a particular ‘sacredness’ in these lands.
Finally, through the comprehension of tangible and intangible values retained in the pilgrimages routes, an in-depth interpretation of the relationship between the traces of ancient and modern cults in Sorrento-Amalfi Peninsula could be reached. Moreover, the comprehension of overlaps and contrasts in the landscape along those itineraries allows to defining adequate guide-lines for the conservation of this cultural palimpsest
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