This paper compares Leontief's 1928 PhD thesis and Sraffa's work in Cambridge in 1927-1928 as reconstructed from Sraffa's unpublished papers. Both authors showed that relative prices and the interest rate can be determined exclusively in terms of the observable amounts of commodities produced...

The paper reports on Jacob H. Hollander's cooperation with John Maynard Keynes and Piero Sraffa in the preparation of the latter's edition of The Works and Correspondence of David Ricardo. The report is based on archive material from various sources, including the unpublished papers of Edwin...