1,720,991 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
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
Freight Transport Cost and Urban Sprawl across EU Regions
No full textThis paper investigates the impact that urban sprawl and land use patterns have on freight transport costs at the regional level in Europe. A unique dataset is employed, which distinguishes various aspects of freight transport costs across EU regions. The measurement of sprawl metrics is based on the European soil sealing (artificial land cover) data concerning the land uptake for buildings and related infrastructure, as well as land use data originating from the Land Use/Cover Area frame Survey of Eurostat. The econometric analysis indicates that both the increased scale and compact development of land for urban settlement and specific (industrial, services/residential) activities can significantly reduce average road freight transport costs. The increased land use mixture and the share of industrial activity also have a negative impact on road freight transport costs. The results highlight the importance of integrated spatial/land use planning policies to manage freight transport costs and improve the sustainable urban development of EU regions
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
Public Expenditure Competition in the Transport Sector: Intermodal and Spatial Considerations for Greece
No full text The development of transport networks requires public investments, in terms of government expenditure, on several types of (road, rail, port, airport, and urban public transport) infrastructure, including their operational and maintenance services. This paper develops and implements a system-wide spatioeconomic model to analyze the expenditure competition among different types of investment in the Greek transport sector. The suggested approach can offer valuable insight into the economies of scale and synergies associated with a particular transport investment. It is also extended to consider how such investment determinants as population concentration, economic growth, and political considerations at the prefecture level affect expenditure allocation to different types of transport infrastructure. The results indicate the statistical significance of scale effects of transport investment, substitution effects of road investment on other types of transport investment, and political factors on different types of transport investment. Airport investment relates to the most significant synergistic effects on expenditures in other types of public transport facilities. Thus, policy makers must take these fiscal externalities into account for the strategic planning and evaluation of infrastructure supply, and coordinate or subsidize public transport projects with significant positive externalities. </jats:p
Transformations in the European Gas Supply Network Due to the Russia–Ukraine Conflict
No full textThe objective of this paper is to demonstrate the structural characteristics of the European gas supply system and changes in its network structure and the interaction and clustering among its nodes defined as countries, following the outbreak of the Russia–Ukraine conflict. The methodology relies on social network analysis, which employs mathematics of the graph theory to examine the state and dynamics of the given network structure. The impacts identified involve the reduced reliance of the system on Russian gas, a considerable reduction in the strength centrality of Russia and Germany, and a higher dispersion of gas flows, largely due to the increased import of LNG flows. After the conflict outbreak, countries such as Italy, Austria, the Slovak Republic, and Hungary retained their high influential position, in terms of the PageRank centrality, while the Balkan countries, together with the Middle East gas suppliers (Turkey and Iran), formed a common group with Russia. The estimated changes stress the challenges posed to the EU countries to enhance connectivity infrastructure investments and explore alternative ways of gas supply to support the objectives of strategic autonomy, while promoting resilience and the path toward a carbon-free transition
GREEK TOURISM IN THE GLOBAL, NATIONAL AND REGIONAL VALUE CHAINS
Full text linkThis article analyses the relationships between international, domestic and regional value chains and tourism sector, in terms of accommodation and food service activities, in Greece. Initially, methods for determining the role of imports in tourism in the context of global value chains (GVCs) and corresponding GVC participation indicators are presented, based on the OECD trade-in-value-added database. Furthermore, suitable analytical methods are explained for estimating the backward linkages from the agricultural sector, transport and other activities into the Greek tourism sector, at both national and regional levels, and the corresponding import multiplier effects on the Greek economy. The impact of inbound tourism and of the imports of services and goods is found to perform a gradual growth, which varies with origin country and product category. In 2018, the countries having the highest value-added share in Greek tourism exports were Germany (10.6%), Italy (7.8), Russia (6.8%), France (6.2%) and the Netherlands (6.1%). The results highlight the existence of significant interregional variations in the backward linkages of tourism, with island regions having greater linkages within the tourism sector, and less backward linkages with other sectors, such as manufacturing, in contrast to the rest of the country. These empirical findings can offer a deeper understanding of the role that tourism plays in the national and regional economy and the magnitude of its impact. They can also contribute to the formulation of appropriate policies with a national and regional dimension, for the sustainable development of the tourism sector itself and related sectors of the economy that interact with tourism. Among other things, such policies may concern the development of alternative forms of tourism and partnerships aimed at creating vertically integrated value chains, both within the tourism sector and between it and other activity clusters in the Greek economy, such as agriculture, food, trade and transport
Public expenditure competition in the transport sector: intermodal and spatial considerations for Greece
No full textThe development of transport networks requires public investments, in terms of government expenditure, on several types of (road, rail, port, airport, and urban public transport) infrastructure, including their operational and maintenance services. This paper develops and implements a system-wide spatioeconomic model to analyze the expenditure competition among different types of investment in the Greek transport sector. The suggested approach can offer valuable insight into the economies of scale and synergies associated with a particular transport investment. It is also extended to consider how such investment determinants as population concentration, economic growth, and political considerations at the prefecture level affect expenditure allocation to different types of transport infrastructure. The results indicate the statistical significance of scale effects of transport investment, substitution effects of road investment on other types of transport investment, and political factors on different types of transport investment. Airport investment relates to the most significant synergistic effects on expenditures in other types of public transport facilities. Thus, policy makers must take these fiscal externalities into account for the strategic planning and evaluation of infrastructure supply, and coordinate or subsidize public transport projects with significant positive externalities.
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