“…In contrast with these early theoretical predictions, with few exceptions relative mainly to Anglo-Saxon countries and high skill labour markets (Simon and Warner, 1992;Kugler, 2003;Goos and Salomons, 2007), the available empirical evidence concurs to reach the conclusion that the wage effect of informal channels is neither positive nor constant across sectors and countries 3 (see, among others, Pistaferri, 1999;Pellizzari, 2004;Bentolila, Michelacci and Suarez, 2004;Meliciani and Radicchia, 2005;Antoninis, 2006;Delattre and Sabatier, 2007;Weber and Mahringer, 2007;Pastore, 2008).…”