“…Since then, a number of studies have attempted to contrast this result in a wide range of educational contexts, through the use of parametric and nonparametric techniques. Such literature has offered mixed conclusions: while a number of studies tend to confirm the results obtained by Coleman et al (1982) (Opdenakker & Van Damme, 2006;Bettinger, 2005;Mizzala, Romaguera & Farren, 2002;Bedi & Garg, 2000;Stevans & Sessions, 2000;Neal, 1997;Jiménez, Lockheed & Paqueo, 1991;Chubb & Moe, 1990;Hanushek, 1986), in others the presumed superiority of private schools vanishes when the analysis includes a wide range of controls (Perelman & Santin, 2008;Mancebón & Muñiz, 2008;Calero & Escardíbul, 2007;Abburrà, 2005;Fertig, 2003;Kirjavainen & Loikkanen, 1998;Goldhaber, 1996;Sander, 1996) or is reduced to specific measurements of the output analyzed (Greene & Kang, 2004), or to specific groups of students defined by race, ethnic group, or academic or socioeconomic profile (Figlio & Stone, 1997). In some cases, there exists a different effect for independent private schools and for PSPS (Dronkers & Robert, 2008;Corten & Dronkers, 2006).…”