“…Abizadeh et al (2007) also showed that transport industries employ relatively unskilled workers compared to manufacturing and other service industries. Several studies (Helpman, Itskhoki, Muendler, & Redding, 2012;Helpman, Itskhoki, & Redding, 2010;Leamer, 1996;Slaughter, 1998;Wood, 1998) showed that trade liberalisation increases wage inequality between high and low-skilled workers, and some studies (Bazen & Cardebat, 2001;Biscourp & Kramarz, 2007;de Pinto & Michaelis, 2014;Wood, 1995) provided evidence that trade openness increased the unemployment rates of low-skilled workers. Thus, to avoid further inequity in wages and unemployment, unskilled workers in transport industries may be less likely to support trade liberalisation through FTAs (Beaulieu, Benarroch, & Gaisford, 2011).…”