1,720,963 research outputs found
Technology Structure of China’s Export of Agricultural Products: Empirical Analysis Based on Technical Complexity
Get PDFAbstract: Growing labour costs, increasing resources and environmental constraints and a desire to emphasize high-quality trade have promoted China to prioritize upgrading the agricultural export structure. This brings forth a need for further research on agricultural export technology. We measure the technical complexity and height based on the sample of 178 countries from 2002 to 2020. The results are then compared with those of the world’s major exporters of agricultural products (APs). We find that China’s AP exports exhibited a pattern of medium-technology products and slowly transitioned towards medium-high and high technology levels. The technology structure of China’s AP exports was significantly lower than that of the major global AP exporters (except Brazil). The overall technical level of China’s APs exports slightly fluctuated near the medium technology grade. The evolutionary trend of the technology structure of China’s APs export differs from its export scale, showing a tendency towards a more downmarket in 2002-2012 but some improvement since 2013. There is a widening gap in the technology structure of APs export between China and major developed exporters. China’s AP exports are losing competitiveness overall, and the upgrading of the technology structure of China’s AP exports was slower. Therefore, the technology structure of China’s APs export can be escalated by raising standards of quality, concentrating on the export of higher technical complexity products, promoting the advances and innovations in agricultural science and technology, and further exploring the trade potential hidden behind the differences between China and other countries in export technology structure.
KEYWORDS: Comparative advantage; Economic transition; Trade competitiveness; Technical height
Changes in Agri-Food Export Competitiveness Based on the Sophistication Analysis: The Case of Xinjiang, China
Get PDFThe Xinjiang Uygur Autonomous Region is a major agri-food export contributor within China. Growing quality requirements for agri-food export, increasing green trade barriers, and a desire to emphasize sustainable trade at regional levels have prompted Xinjiang to pay increased attention to agri-food export competitiveness. The paper uses the export sophistication index to investigate the overall and classificatory export competitiveness of Xinjiang’s Agricultural Products (APs). The results are compared to the national average within China by calculating the relative export sophistication. The research finds that (1) Xinjiang’s APs exports are predominant in medium and medium-low-sophistication products. Along with the expanding scale, its structure has been optimized overall. (2) Horticultural products keep a leading position, not having strong competitiveness in Xinjiang but also far exceeding the national average. However, the bulk APs, livestock products, aquatic products, beverages and tobacco, and other APs have no significant export competitiveness compared to the national average. (3) The export structure of Xinjiang’s APs is highly concentrated in horticultural products, showing an adverse trend in export competitiveness distribution—”the strong getting stronger and the weak getting weaker,” and a slower upgrading than the national average since the outbreak of COVID-19, which requires the attention of policymakers
A systematic review on price volatility in agriculture
Get PDFThe recent extreme volatility in agriculture prices determines serious repercussions to various stakeholders and levels in the food value chain, that is, producers, intermediaries, and customers, at micro-, meso- and macro-economic governance levels, respectively. Persistent high/low degree of agriculture prices leads to unsustainable production/consumption patterns, thus representing an impediment to reaching the goal of responsible consumption and production (UN-SDGs 12). The lack of comprehensive real-time information on price volatility's internal and external factors often resulted in an inconclusive and counterintuitive outcome while performing empirical estimation. The present review was conducted using the PRISMA framework to systematically identify and analyze literature from two important databases. Papers have been grouped by volatility drivers, governance levels, theoretical approaches, and background data types. The present review is a valuable starting point for understanding the links between multi-dimensional factors affecting the persistent price volatility and the theoretical and empirical analytics trends to provide the computational advancement needed to cope with model estimation issues. It also highlights the importance of a paradigm shift in researching agriculture price volatility to addressing food crises, considering principal objectives and perspectives such as food security, poverty alleviation, sustainability in food value chains, and resilience of food systems across the globe
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
Enhancement of structural and magnetic properties of M-type hexaferrite permanent magnet based on synthesis temperature
No full textThe main purpose of this research work is to develop the single domain magnetic particles of M-type barium hexaferrite (BaFe12O19) using oxide precursors employing conventional powder metallurgy technique. The phase formation and magnetic performance of the powders and magnets will be optimized by adjusting calcination and sintering temperatures. The synthesis of M-type barium hexaferrite was carried out in two sections. A series of four samples have been prepared by initial wet mixed powders calcined at different temperatures, i.e., 750, 850, 950 and 1050 degrees C. On the basis of structural analysis, the sample calcined at 950 degrees C has been selected and further divided into four parts to sintered them at 1100,1150,1200 and 1250 degrees C. The structural measurements depict the confirmation of M-type barium hexaferrite structure. SEM micrographs show the hexagonal-shaped grains. The abrupt decrease in coercivity for the sample sintered at 1250 degrees C has been seen which may be due to high sintering temperature, at which the particles have multi-domain properties
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
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
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