Text and Data Mining valid from 2019-05-27
First Online: 27 May 2019
Compliance with Ethical Standards
: This paper was not funded.
: The authors MV, IR, NCB, AA, VRD and WB do not have a conflict of interest to report.
: An open access R tool to calculate absolute and proportional shortfall according to the methods presented in this paper can be found here: ExternalRef removed.