Please use this identifier to cite or link to this item: http://hdl.handle.net/10419/171056
Authors: 
Bornmann, Lutz
Wohlrabe, Klaus
Year of Publication: 
2017
Series/Report no.: 
CESifo Working Paper 6592
Abstract: 
This study is intended to facilitate fair research evaluations in economics. Field- and time-normalization of citation impact is the standard method in bibliometrics. Since citation rates for journal papers differ substantially across publication years and Journal of Economic Literature (JEL) classification codes, citation rates should be normalized for the comparison of papers across different time periods and economic subfields. Without normalization, both factors that are independent of research quality bias the results of citation analyses. We introduce two normalized indicators in economics, which are the most important indicators in bibliometrics: (1) the mean normalized citation score (MNCS) compares the citation impact of a focal paper with the mean impact of similar papers published in the same economic subfield and publication year. (2) PPtop 50% is the share of papers that belong to the above-average half in a certain subfield and time period. Since the MNCS is based on arithmetic averages despite skewed citation distributions, we recommend using PPtop 50% for fair comparisons of entities in economics (e.g. researchers, institutions, or countries). In this study, we apply the method to 294 journals (including normalized scores for 192,524 papers) by assigning them to four citation impact classes and identifying 33 outstandingly cited economics journals.
Subjects: 
bibliometrics
citations
JEL codes
journal ranking
mean normalized citation score (MNCS)
citation percentile
PPtop 50%
JEL: 
A11
A12
A14
Document Type: 
Working Paper

Files in This Item:
File
Size





Items in EconStor are protected by copyright, with all rights reserved, unless otherwise indicated.