“…Three randomized studies in particular are frequently cited to show the potential benefits of early education: the High/Scope Perry Pre-school project (Schweinhart et al, 1993), the Abecedarian project (Ramey & Ramey, 1998;Masse & Barnett, 2002), and the Chicago Child-Parent Center programme (Reynolds, 2003). In all cases, impressive effects have been found, including: better achievement (higher reading, maths and literacy scores), better school adjustment, less repetition and greater school completion, less use of special services, reduced welfare expenditures, greater earnings, and reduced criminal behaviour (Campbell & Ramey, 1994;Reynolds et al, 1996;Ou, 2003;Melhuish, 2004;Ou & Reynolds, 2004). These studies also provide estimates of the economic benefits associated with the programmes; in two cases the return is estimated at 7 to 1 and in one at 4 to 1 (Myers, 2004).…”