1,721,003 research outputs found
The implications of the Russian invasion of Ukraine for African economies: A CGE analysis for Ethiopia
No full textThe Russian invasion of Ukraine contributed to soaring world market prices of many commodities with severe repercussions for many African countries. This study examines the implications of the 2022 world market price increases for wheat, fuels, and fertilizers for Ethiopia. Using a computable general equilibrium (CGE) model, the
study shows negative impacts on GDP, wage rates, and households’ consumption in the country. The effects of fertilizer and petroleum price changes are notable and unequal across production sectors. With increasing import prices of inorganic fertilizers, crop growing activities substitute inorganic fertilizers with animal manure reducing the
use of manure as cooking fuel. The effects on urban households are more severe than
the effects on rural households. Policies supporting biofuels and biogas digesters may dampen the adverse effects stemming from petroleum price surges
The impacts of Russia's invasion of Ukraine on the Kenyan economy: Evidence from an economy‐wide model
No full textRussia's invasion of Ukraine has disrupted the global supply chains of several globally traded commodities. The repercussions for many African countries are concerning. This study assesses the impact of Russia's invasion of Ukraine on the Kenyan economy using a computable general equilibrium model. The model is calibrated using a highly disaggregated social accounting matrix. The analysis particularly focuses on the impacts of changes in world prices for five major commodities of which Kenya is a net importer. The results show rising import price that adversely lowers Kenya's gross domestic product and household consumption. The macroeconomic impacts are particularly driven by the fertilizer and fuel commodity price changes. Activities producing agrifood commodities and providing services are highly affected. Rural households face a higher food consumer price index than their urban counterparts. Subsidizing fuel and fertilizer prices could dampen most of the adverse effects but would come at considerable fiscal costs. The government of Kenya should consider devising policies that strengthen intraregional trade, diversify import origins and improve agricultural productivity and energy efficiency
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
Crop production and irrigation water requirements under climate change 2004-2050
No full textIncreases in CO2 atmospheric concentrations are expected to lead to multiple and possibly opposing effects over crop performance. The paper uses a global economic model (RESCU-Water) to analyse the impacts of changes in climatic conditions and CO2 fertilisation on crop output and on the pressure over water resources coming from irrigation. RESCU-Water is built on a Computable General Equilibrium Framework and distinguishes between the rainfed and irrigated production of eight crop classes. Irrigation is introduced as a separate production factor using a novel valuation method. The yield and irrigation water intensity effects employed to map climate change incidence are derived from spatially-detailed crop modelling using multiple climate datasets. The impacts are analysed for the 2004-2050 timeframe and are measured as deviations from a perfect-mitigation SSP2 baseline. Changes in climatic conditions decrease output and depress the demand for irrigation, whilst discrepancies between tropical and temperate regions increase with concentration levels. Embedding CO2 fertilisation more than offsets these adverse effects by determining a net increase in crop production and a reduction in irrigation water requirements at a regional level. The resulting water savings potential even in the lower concentrations scenario (RCP2.6) warrant more research with the aim of reducing the uncertainty regarding the effects of CO2 fertilisation
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
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