* "Capital Accumulation and Economic Growth", 1961, in Lutz, editor, Theory of Capital* "A New Model of Economic Growth", with James A. Mirrlees, 1962, RES* "The Case for a Commodity Reserve Currency", with A.G. Hart and J. Tinbergen, 1964, UNCTAD* "Essays on Economic Policy", 1964, two volumes.
* Capital Accumulation and Economic Growth, 1961, in Lutz, editor, Theory of Capital* A New Model of Economic Growth, with James A. Mirrlees, 1962, RES* The Case for a Commodity Reserve Currency, with A.G. Hart and J. Tinbergen, 1964, UNCTAD* Essays on Economic Policy, 1964, two volumes.