Columbia subject headings:
Economic development--Effect of education on--Statistics.
Education--Economic aspects--United States--Statistics.
Industrial productivity--United States--Statistics.
Labor supply--Effect of education on--United States--Statistics.
Harvard subject headings:
Economic development--Effect of education on--Statistics.
Education--Economic aspects--United States--Statistics.
Industrial productivity--United States--Statistics.
Labor supply--Effect of education on--United States--Statistics.
Princeton subject headings: