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Ioannidis JPA, Boyack KW, Klavans R (2014)

Estimates of the Continuously Publishing Core in the Scientific Workforce.

PLoS ONE 9(7): e101698. doi:10.1371/journal.pone.0101698

Methodology/Principal Findings

Using the entire Scopus database, we estimated that there are 15,153,100 publishing scientists (distinct author identifiers) in the period 1996–2011. However, only 150,608 (<1%) of them have published something in each and every year in this 16-year period (uninterrupted, continuous presence [UCP] in the literature). This small core of scientists with UCP are far more cited than others, and they account for 41.7% of all papers in the same period and 87.1% of all papers with >1000 citations in the same period. Skipping even a single year substantially affected the average citation impact. We also studied the birth and death dynamics of membership in this influential UCP core, by imputing and estimating UCP-births and UCP-deaths. We estimated that 16,877 scientists would qualify for UCP-birth in 1997 (no publication in 1996, UCP in 1997–2012) and 9,673 scientists had their UCP-death in 2010. The relative representation of authors with UCP was enriched in Medical Research, in the academic sector and in Europe/North America, while the relative representation of authors without UCP was enriched in the Social Sciences and Humanities, in industry, and in other continents.


The proportion of the scientific workforce that maintains a continuous uninterrupted stream of publications each and every year over many years is very limited, but it accounts for the lion’s share of researchers with high citation impact. This finding may have implications for the structure, stability and vulnerability of the scientific workforce.

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It makes a creationist point. very few people really have something to offer new or well back up something that needs help. In origin issues very few people count as researchers and so this is why error is easily enduring. This is why small numbers of ID/YEC thinkers have been able to bring revolution to wrong ideas. One is only fighting a few people. Its not the SCIENTIFIC community or thousands of biologists or educated mankind. Evolution is held up by no more people then could fill a honky tonk. We can take 'em and are. Robert Byers
It is not the number if publications that is important, it is the number of times your papers have been cited by others. Acartia_bogart

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