“…Further, research on undocumented migrants and irregular migration has also been growing in Sweden during the last couple of years (Sager et al, 2016;see Ascher, 2009;Khosravi, 2010;Holgersson, 2011;Sager, 2011;Sigvardsdotter, 2012). More recently, several studies have provided insight into the situation of undocumented migrants on the labour market, with a particular focus on the informal economy (see Gavanas, 2011;Gavanas and Calleman, 2013;Sager, 2015;Öberg, 2016) and the relation to the trade unions (see Frank, 2012;Hellgren, 2014;Neergaard, 2015a;Selberg, 2014Selberg, , 2016Moksnes, 2016).…”