“…The existing literature on public procurement regulation has studied the determinants of public sector costs or linked the public procurement process to infrastructure quality outcomes. A strand of the literature has investigated the effect of discriminatory public procurement policies on service delivery costs, for example McAfee et al (1989), Vagstad (1995), Branco (2002), Naegelen et al (1998), Nakabayashi (2013), Brulhart et al (2004), Marion (2007) and Krasnokutskaya and Seim (2011). Other studies have focused on how the costs of public service delivery are affected by a specific element of public procurement such as publicity (Coviello and Mariniello, 2014;Lewis-Faupel et al, 2016), incentives for accelerated delivery (Lewis et al, 2011), audits (Di Tella and Schardgordsky, 2003;Olken 2007), reputational mechanism (Spagnolo 2009) and competition (Estache and Iimi, 2008;Ohashi 2009).…”