Gradstein, Mark Educational expansion : evidence and interpretation / Mark Gradstein, Denis Nikitin - Washington, D.C. : The World Bank (WB) , 2004 - 18p. : ill. ; 25 cm. - Policy Research working paper No. 3245 . Includes bibliographical references and index. Subjects--Topical Terms: EducationalExpensionInterpretation Gov. Doc. Class. No.: UN WB PRWP-3245