“…Presumably, the usefulness of coworkers as providers of referrals (as in Montgomery, 1991, Simon and Warner, 1992, Galenianos, 2013 or sources of information about available job opportunities (as in Calvó- Armengol and Jackson, 2004, Wahba and Zenou, 2005, Boucher and Goussé, 2019 is due to the fact that, by having worked together in the past, coworkers tend to possess better knowledge about their social contacts' respective skills and are more aware of suitable job openings than other types of social contacts such as former classmates, friends or neighbours, who often lack the professional interaction on the job and the attachment to the relevant labor market segment (see Antoninis, 2006). 2 In recent years, a number of studies have therefore analyzed in more detail this type of social connection and its role for labor market outcomes (see, for instance, Cingano and Rosolia, 2012, Hensvik and Skans, 2016, Glitz, 2017, Saygin et al, 2019.…”