“…Topa, 2001, Weinberg et al, 2004, Bayer et al, 2008, Schmutte, 2010, Hellerstein et al, 2011, Damm, 2012, individuals with the same (ethnic) origin (e.g. Munshi, 2003, Edin et al, 2003, Dustmann et al, 2011, Beaman, 2012, close friends (Cappellari and Tatsiramos, 2010), family members (Kramarz and Skans, 2011), freshmen 3 Recent examples of such studies are Weber and Mahringer (2008) for Austria, Goel and Lang (2010) for Canada, Caliendo et al (2011) for Germany, Frijters et al (2005) for the UK, Kugler (2003), Loury (2006), and Brown et al (2012) for the US, Pellizzari (2010) for a selection of European countries, and Bentolila et al (2010) for both the US and Europe. For a comprehensive summary of the literature on the use of referrals in the labour market, see Ioannides and Loury (2004) and Topa (2011). hallmates (Marmaros and Sacerdote, 2002), and fellow war veterans (Laschever, 2009).…”