By Duncan Greg   Boisjoly Johanne   Kremer Michael   Levy Dan   Eccles Jacque   in Journal of Abnormal Child Psychology

ISSN:0091-0627|33|3|375-385

Springer Publishing Company ‎(2005)‎

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By Boisjoly Johanne   Duncan Greg J.   Kremer Michael   Levy Dan M.   Eccles Jacque   in The American Economic Review

ISSN:0002-8282|96|5|1890-1905

American Economic Association‎(2006)‎

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