CWTS Leiden Ranking 2015

[Loet Leydesdorff]

Ø  It might therefore be informative to take a look at the time trend in the PP(top 10%) values themselves instead of the time trend in the ranking derived from the PP(top 10%) values.

 



 

Dear Nees Jan: 

 

In Dutch one says “Wie A zegt, moet ook B zeggen.” (“Who says A, also says B.”)

 

Indeed, this is somewhat more convincing. Most universities are increasing their share in terms of this indicator (http://doi.org/10.1016/j.joi.2014.05.002 ) . Note that this is SSH. Leiden is doing very good! (That includes CWTS; Congratulations.)

 

I assume that the fluctuations are often within the confidence levels; these could be plotted additionally. Indeed, the system is dynamic:


Correlations


 

v06t09

v07t10

v08t11

v09t12

v10t13


v06t09

Pearson Correlation

1

.914**

.575*

.385

.269


Sig. (2-tailed)

 

.000

.040

.194

.375


N

13

13

13

13

13


v07t10

Pearson Correlation

.914**

1

.748**

.464

.393


Sig. (2-tailed)

.000

 

.003

.110

.184


N

13

13

13

13

13


v08t11

Pearson Correlation

.575*

.748**

1

.833**

.828**


Sig. (2-tailed)

.040

.003

 

.000

.000


N

13

13

13

13

13


v09t12

Pearson Correlation

.385

.464

.833**

1

.910**


Sig. (2-tailed)

.194

.110

.000

 

.000


N

13

13

13

13

13


v10t13

Pearson Correlation

.269

.393

.828**

.910**

1


Sig. (2-tailed)

.375

.184

.000

.000

 


N

13

13

13

13

13


**. Correlation is significant at the 0.01 level (2-tailed).


*. Correlation is significant at the 0.05 level (2-tailed).

 

The last column (or equivalently the bottom line) is convincing. (Continuous increase in the values of r.)

 

Best,

Loet

 

  _____  

Loet Leydesdorff 

Emeritus University of Amsterdam
Amsterdam School of Communication Research (ASCoR)

 <mailto:loet at leydesdorff.net> loet at leydesdorff.net ;  <http://www.leydesdorff.net/> http://www.leydesdorff.net/ 
Honorary Professor,  <http://www.sussex.ac.uk/spru/> SPRU, University of Sussex; 

Guest Professor  <http://www.zju.edu.cn/english/> Zhejiang Univ., Hangzhou; Visiting Professor,  <http://www.istic.ac.cn/Eng/brief_en.html> ISTIC, Beijing;

Visiting Professor,  <http://www.bbk.ac.uk/> Birkbeck, University of London; 

 <http://scholar.google.com/citations?user=ych9gNYAAAAJ&hl=en> http://scholar.google.com/citations?user=ych9gNYAAAAJ&hl=en

 

 

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