“…The evidence emphasized the existence of a significant crowding-in effect of public investment on private investment, as there was a positive impact of infrastructure on private investment productivity. However, another set of empirical studies negated the hypothesis and found diametrically opposite evidence, thereby concluding in favour of the crowding-out of private investment by public investment (Alesina et al, 2002; Apergis, 2000; Atabev et al, 2018; Mountford & Uhlig, 2005; Voss, 2002; Xu & Yan, 2014). But at the same time, some studies advocated that there is no significant relationship between the two (Badawi, 2003; Kollamparambil & Nicolaou, 2011; Narayan, 2004 2 ; Naqvi & Tsoukis, 2003) or crowding-in during the short-run and crowding-out during long-run (Nguyen & Trinh, 2018).…”