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The American High School Graduation Rate: Trends and Levels / James J. Heckman, Paul A. LaFontaine. by Series: Working Paper Series (National Bureau of Economic Research) ; no. w13670.
Material type: Text Text; Format: available online remote; Literary form: Not fiction ; Audience: Specialized;
Publication details: Cambridge, Mass. National Bureau of Economic Research 2007
Availability: Items available for reference: Biblioteca Digital: Not For Loan (1)Call number: nber w13670.

Taking the Easy Way Out: How the GED Testing Program Induces Students to Drop Out / James J. Heckman, John Eric Humphries, Paul A. LaFontaine, Pedro L. Rodriguez. by Series: Working Paper Series (National Bureau of Economic Research) ; no. w14044.
Material type: Text Text; Format: available online remote; Literary form: Not fiction ; Audience: Specialized;
Publication details: Cambridge, Mass. National Bureau of Economic Research 2008
Availability: Items available for reference: Biblioteca Digital: Not For Loan (1)Call number: nber w14044.

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