1. AERC: Agricultural Economics Research Centre. 1971. Primary Education in Rural India: Participation and Wastage. Delhi: Tata McGraw Hill.
2. Arrow, Kenneth J. 1973. Higher Education as a Filter. Journal of Public Economics 2 (3) (July): 193–216.
3. Balogh, Thomas, and Paul Streeten. 1963. The Coefficient of Ignorance. Bulletin of Oxford University Institute of Statistics 25 (2): 97–107.
4. Barro, Robert. 1999. Human Capital and Growth in Cross-Country Regressions. Swedish Economic Policy Review 6 (2): 237–277.
5. Barro, R., and X. Sala-i-Martin. 1995. Economic Growth, NY: McGraw-Hill.