Since publication of the printed version in September 2003, new
materials came to light. This is a list.
- W. O. Hart and R. F. Harrod, "Oxford University Voting
Papers", letter to the Editor of The Times, 25 May 1929.
The authors supply an information requested by a correspondent of
The Times concerning the voting papers being cast before
the date of 31 May 1929.
- Harrod, letter to Hicks, 2 November 1932 (answered by
letter 262 on 4 November
1932), 3 pages, autograph. It begins: "I have been reading your
book, all of it with very great interest. There is one point
pp. 122 and 123
your extension of the Pigovian
def[inition] leads you to make this rmark about neutral
innovations, which is nt really right. If considerations of
expenditure are excluded, neutral defines the invention
completely; there can be no range of neutral inventions
(information drawn from an unpublished catalogue prepared for the
sale of the Hicks papers).
- Harrod and Ragnar Frisch, exchange in October 1936: Harrod
to Frisch, 1 October, and Frisch
to Harrod, 16 October (full transcription).