Equal weights coauthorship sharing and the Shapley value are equivalent

• Shapley value is applied for publication credit allocation problem.
• The equivalence of the Shapley and equal weights coauthorship sharing is proved.
• Results are extended for heterogeneous scholars.

The publication credit allocation problem is one of the fundamental problems in bibliometrics. There are two solutions which do not use any additional information: equal weights measure and the Shapley value. The paper justifies the equal weights measure by showing equivalence with the Shapley value approach for sharing co-authors performance in specific games.