- Author: National Academy of Engineering, National Academy of Engineering, National Academy of Sciences
- Language: English
- Year: 1991
- Author: William A. Sundstrom, Timothy W. Guinnane, Warren C. Whatley
- Language: English
- Year: 2003
- Author: Gregory C. Shaffer
- Language: English
- Year: 2012
OECD Forum 2005
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