“…5 For example, the literature contains studies that use long-term relatedness to explain income differences between countries (Spolaore and Wacziarg, 2009), migration flows (Belot and Ederveen, 2011;Dahl and Sorenson, 2010;Falck et al, 2012Falck et al, , 2017Mayda, 2009), the diffusion of technology (Comin et al, 2012;Spolaore and Wacziarg, 2012), trade patterns (Guiso et al, 2009;Felbermayr and Toubal, 2010), and investment behavior (Guiso et al, 2009). exceed migration costs (Borjas, 1987;Sjaastad, 1962). Benefits and migration costs differ between high-and low-skilled individuals and can be both monetary and non-monetary (Sjaastad, 1962;Schwartz, 1973).…”