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by West, Martin R.; Woessmann, Ludger
by Hanushek, Eric A.; Woessmann, Ludger
by Hanushek, Erik A.; Machin, Stephen; Woessmann, Ludger
by Woessmann, Ludger; Peterson, Paul E.
by Woessmann, Ludger; Luedemann, Elke; Schuetz, Gabriela; et al.
by Falck, Oliver; Gollier, Christian; Woessmann, Ludger
by Hanushek, Eric A.; Peterson, Paul E.; Woessmann, Ludger