“…This point is also made by in their review article. Regarding the literature on the impact of refugees on health outcomes of natives,Ruiz et al (2017) point out that the scarcity of data and the difficulty of measuring the potential effects and interpreting the results as causal effects of refugees are the major obstacles.5 See, for instance,Akresh et al (2012),Avogo and Agadjanian (2010),Bundervoet et al (2009),Guerrero-Serdán (2009),Guha-Sapir and Gijsbert (2004),Hargreaves et al (2004),Khawaja (2004),Madi (2000),Minoiu and Shemyakina (2014),Singh et al (2005aSingh et al ( , 2005b,Verwimp and van Bavel (2005).…”