“…María José Murgui-García https://orcid.org/0000-0003-2712-1278 ENDNOTES 1 The first person to introduce the shift-share approach to the study of regional productivity growth was Esteban (2000), who modelled regional productivity growth as the sum of three components: structural change, differential industry productivity and the allocative effect. This form of shift-share has also been used by Le Gallo et al (2003), Le Gallo and Dall'Erba et al (2008), Batóg and Batóg (2007) and, with a slight variation, by Ezcurra et al (2005) and Le Gallo and Kamarianakis (2011), who also introduced spatial econometrics. 2 This idea is based on the famous Kuznets curve (Kuznets, 1955), which postulates the same relationship between a country per capita income and personal inequality.…”