“…While most of the literature has found significant regional disparities in Okun's coefficient (e.g., in the Czech Republic and Slovakia [Durech et al, 2014], Canada [Adanu, 2005], and France [Binet and Facchini, 2013]), some countries were not found to have significant regional variation (e.g., Spain [Villaverde and Maza, 2009] and Greece [Apergis and Rezitis, 2003]). Moreover, the strength of the relationship has been found to vary across countries (see Paldam [1987], Kaufman [1988], Moosa [1997], Lee [2000], Freeman [2001, Cazes et al [2013], Hutengs and Stadtmann [2013]). This variation is often attributed to differences in employment protection and minimum wage laws, the power of trade unions, and demographics.…”