RT Journal Article T1 IndexNumber: An R Package for Measuring the Evolution of Magnitudes A1 Saavedra Nieves, Alejandro A1 Saavedra Nieves, Paula AB Index numbers are descriptive statistical measures useful in economic settings for comparing simple and complex magnitudes registered, usually in two time periods. Although this theory has a large history, it still plays an important role in modern today’s societies where big amounts of economic data are available and need to be analyzed. After a detailed revision on classical index numbers in literature, this paper is focused on the description of the R package IndexNumber with strong capabilities for calculating them. Two of the four real data sets contained in this library are used for illustrating the determination of the index numbers in this work. Graphical tools are also implemented in order to show the time evolution of considered magnitudes simplifying the interpretation of the results. PB The R Foundation SN 2073-4859 YR 2021 FD 2021 LK http://hdl.handle.net/10347/33493 UL http://hdl.handle.net/10347/33493 LA eng NO Saavedra-Nieves, A., & Saavedra-Nieves, P. (2021). IndexNumber: An R Package for Measuring the Evolution of Magnitudes. R Journal, 13(1), 253-275 NO A. Saavedra-Nieves acknowledges the financial support of FEDER/Ministerio de Ciencia, Innovación y Universidades - Agencia Estatal de Investigación under grant MTM2017-87197-C3-3-P. P. Saavedra- Nieves acknowledges the financial support of Ministerio de Economía y Competitividad of the Spanish government under grants MTM2016-76969-P and MTM2017-089422-P, and by the Xunta de Galicia through the European Regional Development Fund (Grupos de Referencia Competitiva ED431C-2017/38). DS Minerva RD 22 abr 2026