Some Comments Get access J. Marschak J. Marschak All Souls College, Oxford Search for other works by this author on: Oxford Academic Google Scholar The Quarterly Journal of Economics, Volume 48, Issue 4, August 1934, Pages 759–766, https://doi.org/10.2307/1883552 Published: 01 August 1934

In the work done to obtain demand functions from market data, the influence of income changes on demand has been usually eliminated (by Professor Schultz and others) by regarding the national income per head, R, as a linear component of the demand function; sometimes a parameter supposed to characterize the distribution (such as Pareto's a or some index of concentration)' was used as another such component, e.g.:

tN a recent paper, John Maurice Clark pleaded for greater communicability between mathematical economists and others: 2 the results obtained by mathematical economists would be far more useful if they became part of the common equipment of economists general; the general economist should have these results put for him in a form that makes it possible for him to appraise their significance. Professor Clark advocates, as it were, translating from one language into another to establish communication. Professors Crum and Schumpeter give an alternative: to learn the foreign language, or at least its rudiments. In I938, Professor Crum published Rudimentary Mathematics for Economists and Statisticians as a supplement to the Quarterly Journal of Economics. In the preface, the author remarked: