1. S. Marglin, ‘The Social Rate of Discount and the Optimal Rate of Investment’, Quarterly Journal of Economics (Feb 1963).
2. A. C. Pigou, The Economics of Welfare 4th ed. (London, 1932) esp. pp. 23–30.
3. M. Dobb, An Essay on Economic Growth and Planning (London, 1960).
4. A. K. Sen, ‘On Optimising the Rate of Saving’, Economic Journal (Sept 1961).
5. O. Eckstein, ‘A Survey of the Theory of Public Expenditure Criteria’, in N.B.E.R., Public Finances: Needs, Sources and Utilisation (Princeton, 1961).