‘Über die Produktionsgleichungen der ökonomischen Wertlehre’, in eds K. Menger and F. Deuticke, Ergebnisse eines mathematischen Kolloquiums, vol. 7, 1936, trans, as ‘On the Production Equations of Economic Value Theory (Part 2)’ in eds W.J. Baumol and S. M. Goldfeld, Precursors in Mathematical Economics: An Anthology (London: LSE, 1968), pp. 289-93. Copyright © London School of Economics, reproduced with permission - Abraham Wald (2024)