“…In the United States, for example, studies generally show poor effectiveness of state-implemented programmes (Neumark & Kolko, 2010), unlike the federal programme (Busso et al, 2013). As regards the policies implemented in France, and more specifically those introduced in rural areas, Behaghel et al (2015) highlight the lack of impact of the ZRR, particularly when compared with the estimated impacts of the ZFU (Givord et al, 2013;. The majority of these studies explain these limited and contrasting economic findings as the result, on the one hand, of the effects of activity moving from non-beneficiary areas to beneficiary areas (Mayer et al, 2017;Einiö & Overman, 2020), and, on the other hand, of the significant heterogeneity of the findings with local characteristics (Briant et al, 2015).…”