Part II, Chapter 6, Unemployment and Inflation, p. 130
The Death of Economics (1994)
“And since any inflation, however modest at first, can help employment only so long as it accelerates, adopted as a means of reducing unemployment, it will do so for any length of time only while it accelerates. "Mild" steady inflation cannot help—it can lead only to outright inflation. That inflation at a constant rate soon ceases to have any stimulating effect, and in the end merely leaves us with a backlog of delayed adaptations, is the conclusive argument against the "mild" inflation represented as beneficial even in standard economics textbooks.”
1980s Unemployment and the Unions: Essays on the Impotent Price Structure of Britain and Monopoly in the Labour Market https://books.google.com/books?id=zZu3AAAAIAAJ&q=%22only+while+it+accelerates%22&dq=%22only+while+it+accelerates%22&hl=en&sa=X&ei=HBhsUYjUGMv34QSW-YDgDg&redir_esc=y (1984)
1980s and later
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Friedrich Hayek 79
Austrian and British economist and Nobel Prize for Economic… 1899–1992Related quotes

Speech to the Labour Party Conference in Blackpool (28 September 1976), quoted in Labour Party Annual Conference Report 1976, p. 188 and James Callaghan, Time and Chance (Collins, 1987), p. 426. This part of his speech was written by his son-in-law, future BBC Economics correspondent Peter Jay
Prime Minister

Mansion House Speech (17 October 1985), quoted in The View from No. 11: Memoirs of a Tory Radical (London: Bantam, 1992), pp. 480-481.

Thomas J. Sargent, "The Ends of Four Big Inflations" (1981).

Hugh Anderson Memorial lecture at the Cambridge Union (28 February 1975), quoted in The Times (1 March 1975), p. 2
1970s

Source: Why Stock Markets Crash - Critical Events in Complex Systems (2003), Chapter 6, Hierarchies, Complex Fractal Dimensions, And Log Periodicity, p. 185.

1975 interview https://mises.org/library/hayek-meets-press-1975 on "Meet the Press."
1960s–1970s
“As soon as interest is abolished, inflation becomes unnecessary…”
Source: Interest and Inflation Free Money (1995), Chapter Two, Creating an Interest and Inflation Free Money, p. 41