“…Both frameworks allow for testing the effect of the policies interventions at the regional level (Fabrizi, Guastella, Marta, & Timpano, 2016). The studies that test the regional convergence of per capita income or labour productivity in Europe generally confirm the prediction of convergence, finding higher growth rates in the least developed regions (Fiaschi, Lavezzi, & Parenti, 2018; Guastella & Timpano, 2016; Pellegrini, Terribile, Tarola, Muccigrosso, & Busillo, 2013). In some cases, however, researchers find diverging dynamics among European regions (Perugini & Signorelli, 2004; Petrakos & Artelaris, 2009), highlighting that regional economic performance varies according to national characteristics (Cuaresma, Doppelhofer, & Feldkircher, 2014; Crescenzi & Giua, 2020).…”