World science in the eighties. National performances in publication output and citation impact, 1985–1989versus 1980–1984

Self Cite

A statistical model for citation processes, a particular version of a non-homogeneous birth process, is analysed in the context of predictions of future citation rates, Important properties of the process were already studied by the author in earlier papers, Although the applicability of the model was demonstrated by several examples, practical aspects of predictions and questions of statistical reliability were not tackled so far. The present study is focused on the demonstration of the possibility of true predictions and on the analysis of the statistical reliability of predictions based on the mean value function E(X(t)-X(s)lX(s)=i) of citation processes. The citation rates for papers published in 1980 and 1991 were recorded in the period 1980 through 1995, and 1991 through 1995, respectively, in all science areas, It is shown that parameters of mean value functions estimated for earlier time periods can be applied to more recent years, too. As a byproduct, the model may serve as a validation tool for the particular choice of citation windows in evaluation studies.

Section: Resultssupporting

confidence: 70%

On the possibility and reliability of predictions based on stochastic citation processes

Glänzel¹

1997

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“…Canada, France, UK, and USA, traditionally known as scientific leaders (see e.g. [BRAUN & AL., 1994A;1994B;MAY, 1997;KING, 2004]), are found to have a behavior far from expected. Although, they are revealed to stand out in Engineering & Material Sciences, they fail to position on the top in the whole OA system or in the two other disciplines.…”

Section: Discussionmentioning

confidence: 60%

“…Advanced countries followed by proficient countries gain the lion share of OA articles, as is the case in the global science system, too (see e.g. BRAUN & AL., 1994A;1994B;MAY, 1997;KING, 2004]). Countries approach to contributing to the OAJs: In order to investigate the publication strategy of the scientific groups regarding the OAJs, we tried to answer two questions: Do the groups show more tendency towards these journals compared to the past?…”

Section: Oa Articles General Featuresmentioning

confidence: 97%

“…Exploring the world's countries scientific contributions, they report on the expected and observed levels of the countries' citation performance for the periods 1978-1980, 1981-1985and 1980(see e.g. [BRAUN & AL., 19851987;1988A;1988B;1988C;1993;1994A;1994B;). Some of the global studies are specifically directed towards the investigation of inequalities in citation distribution in the science system using different methods and at different levels of aggregation.…”

Section: Related Studiesmentioning

confidence: 97%

See 1 more Smart Citation

Countries positioning in open access journals system: An investigation of citation distribution patterns

Sotudeh

Horri

2009

By their widespread availability and dissemination through open access media, scholarly outputs witness an improved visibility supposed to cause a better citation performance. However, due to the existence of the Matthew effect in science system, which affects users' perceptions of quality, ultimate effects of the enhanced visibility on different entities are obscure. Moreover, different attitudes towards open access give rise to a more strong quality dynamics in the open access world. Aiming to explore the consequence of the interaction between visibility and quality dynamics, this study investigates countries positioning in open access journals. The results show that the world's countries welcome open access pattern whether by submitting to or publishing open access journals. A large proportion of the enduring, prestigious open access journals are published by scientifically proficient and developing nations, emphasizing their successful commitment to maintain the undertaken role. The results of the citation analysis highlight national inequalities regarding citation distributions among countries contributing to the journals within the system and within individual disciplines in the system. Well-performing countries mainly consist of advanced ones; however, some lessdeveloped nations are found to perform well in the journal system.

“…1 This kind of analysis has been already used to investigate the distribution of research activity across the fields of science at national level. [2][3][4][5][6] Also other recent bibliometric studies have been realised in order to define the scientific specialisation at national level, 7 but less attention has been devoted to verify the existence of a specialisation profile across research fields in intermediate levels of institutional and administrative governance structures, such as the Italian regions.…”

Section: Introductionmentioning

confidence: 99%

The scientific specialisation of the Italian regions

Tuzi

2005

The possible existence of specialisation patterns by research fields of the Italian regions is investigated. Accordingly, bibliometric data on papers published in international scientific journals have been processed and tailored for regional comparative analysis. The results show that the trends in scientific regional specialisation are related to the research activities performed by each scientific system, but also the regional industrial skill is very often reflected in the corresponding scientific profile.The empirical evidences show also that each Italian region works as a well identifiable scientific system providing for its own specific contribution to the national performance.