1,720,962 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
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
The impact of governance on efficiency: case studies on airports and seaports
No full textAirports and seaports have experienced significant governance reforms over the last few decades. As major airports are argued to have market power, they are subject to some form of economic regulation. Airports used to be subject to rate-of-return regulation. More recently, there has been a reform in airport economic regulation and they are increasingly being subject to incentive based price-cap regulation and light-handed regulation or monitoring. In the policy debate, it is of interest to analyse whether price-cap regulation and light-handed regulation of airports are superior to rate-of-return regulation. In the case of seaports, there has been a reform in their governance model and a large number of seaports now follow the landlord seaport model. In a landlord seaport, the port authority is responsible for monitoring and coordination while specialized private terminal operators are responsible for cargo handling and seaport operations. Policy debates have focused on whether the landlord seaport model leads to superior performance in comparison to the service seaport model where most responsibilities are handled by the port authority or the public sector. Airports and seaports are increasingly being regulated by independent regulators because they are not susceptible to regulatory capture. Policy debates have also focused on whether independent regulators lead to a superior performance in comparison to dependent regulators.
The first part of this thesis focuses on airport regulation and its impact on efficiency. We conduct a literature review of the theoretical and empirical literature on airport regulation and efficiency. We find that dual-till price-cap regulation and light-handed regulation are preferable to rate-of-return regulation from an efficiency perspective. We also find that while light-handed regulation leads to efficient airports, it does not necessarily constrain airport charges and hence does not lead to the cheapest airports. We find that independent regulators enhance airport performance. With respect to slot allocation, we find that slot allocation is superior to queuing in terms of capacity, delay and congestion management. However, we find that slot allocation based on economic principles is superior to administrative slot allocation. In this part of the thesis, we also identify gaps in the empirical literature which require further analysis.
The next part of the thesis focuses on the impact of governance on the technical efficiency of major Indian seaports. This chapter uses a non-oriented slacks based measure of technical efficiency in the first stage and a fixed effects regression in the second stage in order to analyse the impact of governance on the technical efficiency of the major Indian seaports. From the first stage, we find that most of the seaports have a scope for improvement in technical efficiency. From the second stage analysis, we find that specialization has the highest positive impact on technical efficiency. We hence propose that the major Indian seaports have to specialize because they can benefit from economies of scale. With respect to ownership, we find that external stakeholder participation has a significant positive impact on technical efficiency. This gives evidence that the landlord seaport model is conducive to enhanced technical efficiency. With respect to competition, we find that competition from the non-major Indian seaports from within the state and along the coast has a significant negative impact on the technical efficiency of the major Indian seaports. We argue that this is because of the tiered governance framework, which results in excess capacity at the major Indian seaports. We propose that the seaports should have a common governance, institutional and regulatory framework, which can enhance their performance. With respect to regulation, we find that rate-of-return regulation by an independent regulator is superior to internal regulation by the port authority in terms of technical efficiency. We argue that this is because the independent regulator is not susceptible to regulatory capture unlike the port authorities.
The last part of the thesis focuses on the impact of governance on the technical efficiency of container ports from the Far East and Asian region. This chapter uses stochastic frontier analysis in order to estimate a production frontier. It makes use of a single step procedure which can be used to estimate the production frontier as well as to estimate the impact of the governance-related contextual variables on the technical efficiency of these container ports. We estimate the individual as well as the combined effects of the governance-related contextual variables on the technical efficiency of these container ports. From the individual effects model, we find that majority private container ports are significantly more technically efficient in comparison to minority private container ports. This gives evidence that the landlord seaport model is conducive to enhanced technical efficiency. With respect to competition, from the individual effects model, we find that both hinterland and transshipment competition enhance the technical efficiency of these container ports. With respect to regulation, from the individual effects model, we find that regulation by an independent regulator is the most conducive to enhanced technical efficiency. In the combined effects model, a majority private container port which faces high hinterland competition and has no economic regulation is taken as the base case. Most of the other combinations of the contextual variables result in a significantly lower technical efficiency in comparison to the base case. However, a majority private container port which faces low hinterland competition and either has no economic regulation or is regulated by an independent regulator is significantly more technically efficient in comparison to the base case. Our results further show that when a port is majority private and faces low hinterland competition, regulation by an independent regulator results in a significantly higher technical efficiency in comparison to having no economic regulation. We argue that this is caused because there is excessive entry and hence majority private container ports which face low hinterland competition and are regulated by an independent regulator are the most technically efficient. We propose that along with the setting up of independent regulators for container ports, policymakers should also ensure that entry is at an optimal level, which can result in competition that is effective and technical efficiency enhancing
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
The impact of governance on efficiency: case studies on airports and seaports
Full text linkAirports and seaports have experienced significant governance reforms over the last few decades. As major airports are argued to have market power, they are subject to some form of economic regulation. Airports used to be subject to rate-of-return regulation. More recently, there has been a reform in airport economic regulation and they are increasingly being subject to incentive based price-cap regulation and light-handed regulation or monitoring. In the policy debate, it is of interest to analyse whether price-cap regulation and light-handed regulation of airports are superior to rate-of-return regulation. In the case of seaports, there has been a reform in their governance model and a large number of seaports now follow the landlord seaport model. In a landlord seaport, the port authority is responsible for monitoring and coordination while specialized private terminal operators are responsible for cargo handling and seaport operations. Policy debates have focused on whether the landlord seaport model leads to superior performance in comparison to the service seaport model where most responsibilities are handled by the port authority or the public sector. Airports and seaports are increasingly being regulated by independent regulators because they are not susceptible to regulatory capture. Policy debates have also focused on whether independent regulators lead to a superior performance in comparison to dependent regulators.
The first part of this thesis focuses on airport regulation and its impact on efficiency. We conduct a literature review of the theoretical and empirical literature on airport regulation and efficiency. We find that dual-till price-cap regulation and light-handed regulation are preferable to rate-of-return regulation from an efficiency perspective. We also find that while light-handed regulation leads to efficient airports, it does not necessarily constrain airport charges and hence does not lead to the cheapest airports. We find that independent regulators enhance airport performance. With respect to slot allocation, we find that slot allocation is superior to queuing in terms of capacity, delay and congestion management. However, we find that slot allocation based on economic principles is superior to administrative slot allocation. In this part of the thesis, we also identify gaps in the empirical literature which require further analysis.
The next part of the thesis focuses on the impact of governance on the technical efficiency of major Indian seaports. This chapter uses a non-oriented slacks based measure of technical efficiency in the first stage and a fixed effects regression in the second stage in order to analyse the impact of governance on the technical efficiency of the major Indian seaports. From the first stage, we find that most of the seaports have a scope for improvement in technical efficiency. From the second stage analysis, we find that specialization has the highest positive impact on technical efficiency. We hence propose that the major Indian seaports have to specialize because they can benefit from economies of scale. With respect to ownership, we find that external stakeholder participation has a significant positive impact on technical efficiency. This gives evidence that the landlord seaport model is conducive to enhanced technical efficiency. With respect to competition, we find that competition from the non-major Indian seaports from within the state and along the coast has a significant negative impact on the technical efficiency of the major Indian seaports. We argue that this is because of the tiered governance framework, which results in excess capacity at the major Indian seaports. We propose that the seaports should have a common governance, institutional and regulatory framework, which can enhance their performance. With respect to regulation, we find that rate-of-return regulation by an independent regulator is superior to internal regulation by the port authority in terms of technical efficiency. We argue that this is because the independent regulator is not susceptible to regulatory capture unlike the port authorities.
The last part of the thesis focuses on the impact of governance on the technical efficiency of container ports from the Far East and Asian region. This chapter uses stochastic frontier analysis in order to estimate a production frontier. It makes use of a single step procedure which can be used to estimate the production frontier as well as to estimate the impact of the governance-related contextual variables on the technical efficiency of these container ports. We estimate the individual as well as the combined effects of the governance-related contextual variables on the technical efficiency of these container ports. From the individual effects model, we find that majority private container ports are significantly more technically efficient in comparison to minority private container ports. This gives evidence that the landlord seaport model is conducive to enhanced technical efficiency. With respect to competition, from the individual effects model, we find that both hinterland and transshipment competition enhance the technical efficiency of these container ports. With respect to regulation, from the individual effects model, we find that regulation by an independent regulator is the most conducive to enhanced technical efficiency. In the combined effects model, a majority private container port which faces high hinterland competition and has no economic regulation is taken as the base case. Most of the other combinations of the contextual variables result in a significantly lower technical efficiency in comparison to the base case. However, a majority private container port which faces low hinterland competition and either has no economic regulation or is regulated by an independent regulator is significantly more technically efficient in comparison to the base case. Our results further show that when a port is majority private and faces low hinterland competition, regulation by an independent regulator results in a significantly higher technical efficiency in comparison to having no economic regulation. We argue that this is caused because there is excessive entry and hence majority private container ports which face low hinterland competition and are regulated by an independent regulator are the most technically efficient. We propose that along with the setting up of independent regulators for container ports, policymakers should also ensure that entry is at an optimal level, which can result in competition that is effective and technical efficiency enhancing
The impact of governance on efficiency: case studies on airports and seaports
No full textAirports and seaports have experienced significant governance reforms over the last few decades. As major airports are argued to have market power, they are subject to some form of economic regulation. Airports used to be subject to rate-of-return regulation. More recently, there has been a reform in airport economic regulation and they are increasingly being subject to incentive based price-cap regulation and light-handed regulation or monitoring. In the policy debate, it is of interest to analyse whether price-cap regulation and light-handed regulation of airports are superior to rate-of-return regulation. In the case of seaports, there has been a reform in their governance model and a large number of seaports now follow the landlord seaport model. In a landlord seaport, the port authority is responsible for monitoring and coordination while specialized private terminal operators are responsible for cargo handling and seaport operations. Policy debates have focused on whether the landlord seaport model leads to superior performance in comparison to the service seaport model where most responsibilities are handled by the port authority or the public sector. Airports and seaports are increasingly being regulated by independent regulators because they are not susceptible to regulatory capture. Policy debates have also focused on whether independent regulators lead to a superior performance in comparison to dependent regulators.
The first part of this thesis focuses on airport regulation and its impact on efficiency. We conduct a literature review of the theoretical and empirical literature on airport regulation and efficiency. We find that dual-till price-cap regulation and light-handed regulation are preferable to rate-of-return regulation from an efficiency perspective. We also find that while light-handed regulation leads to efficient airports, it does not necessarily constrain airport charges and hence does not lead to the cheapest airports. We find that independent regulators enhance airport performance. With respect to slot allocation, we find that slot allocation is superior to queuing in terms of capacity, delay and congestion management. However, we find that slot allocation based on economic principles is superior to administrative slot allocation. In this part of the thesis, we also identify gaps in the empirical literature which require further analysis.
The next part of the thesis focuses on the impact of governance on the technical efficiency of major Indian seaports. This chapter uses a non-oriented slacks based measure of technical efficiency in the first stage and a fixed effects regression in the second stage in order to analyse the impact of governance on the technical efficiency of the major Indian seaports. From the first stage, we find that most of the seaports have a scope for improvement in technical efficiency. From the second stage analysis, we find that specialization has the highest positive impact on technical efficiency. We hence propose that the major Indian seaports have to specialize because they can benefit from economies of scale. With respect to ownership, we find that external stakeholder participation has a significant positive impact on technical efficiency. This gives evidence that the landlord seaport model is conducive to enhanced technical efficiency. With respect to competition, we find that competition from the non-major Indian seaports from within the state and along the coast has a significant negative impact on the technical efficiency of the major Indian seaports. We argue that this is because of the tiered governance framework, which results in excess capacity at the major Indian seaports. We propose that the seaports should have a common governance, institutional and regulatory framework, which can enhance their performance. With respect to regulation, we find that rate-of-return regulation by an independent regulator is superior to internal regulation by the port authority in terms of technical efficiency. We argue that this is because the independent regulator is not susceptible to regulatory capture unlike the port authorities.
The last part of the thesis focuses on the impact of governance on the technical efficiency of container ports from the Far East and Asian region. This chapter uses stochastic frontier analysis in order to estimate a production frontier. It makes use of a single step procedure which can be used to estimate the production frontier as well as to estimate the impact of the governance-related contextual variables on the technical efficiency of these container ports. We estimate the individual as well as the combined effects of the governance-related contextual variables on the technical efficiency of these container ports. From the individual effects model, we find that majority private container ports are significantly more technically efficient in comparison to minority private container ports. This gives evidence that the landlord seaport model is conducive to enhanced technical efficiency. With respect to competition, from the individual effects model, we find that both hinterland and transshipment competition enhance the technical efficiency of these container ports. With respect to regulation, from the individual effects model, we find that regulation by an independent regulator is the most conducive to enhanced technical efficiency. In the combined effects model, a majority private container port which faces high hinterland competition and has no economic regulation is taken as the base case. Most of the other combinations of the contextual variables result in a significantly lower technical efficiency in comparison to the base case. However, a majority private container port which faces low hinterland competition and either has no economic regulation or is regulated by an independent regulator is significantly more technically efficient in comparison to the base case. Our results further show that when a port is majority private and faces low hinterland competition, regulation by an independent regulator results in a significantly higher technical efficiency in comparison to having no economic regulation. We argue that this is caused because there is excessive entry and hence majority private container ports which face low hinterland competition and are regulated by an independent regulator are the most technically efficient. We propose that along with the setting up of independent regulators for container ports, policymakers should also ensure that entry is at an optimal level, which can result in competition that is effective and technical efficiency enhancing
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