Hayeks works that deal with Economic theory.
Contra Keynes and Cambridge: Essays, Correspondence (Collected Works of FA Hayek, Bruce Caldwell editor)
In 1931, when the young F. A. Hayek challenged the economic theories of John Maynard Keynes, sixteen years his senior, and one of the world's leading economists, he sparked a spirited debate that would influence economic policy in democratic countries for decades. Their extensive exchange lasted until Keynes's death in 1946, and is reprinted in its entirety in this latest volume of The Collected Works of F. A. Hayek.
A Tiger By the Tail: The Keynesian Legacy of Inflation — For various reasons Hayek never did write his critique of 'The General Theory'. In 1972 Sudha Shenoy put that right by compiling & editing a book length refutation of Keynesianism entirly from Hayek's dispersed work on the subject.
Collectivist Economic Planning — A collection of essays on the the problem of socialist calculation. Edited by Hayek, who also authored the closing & opening essays on the history & present state of the debate. Includes Mises 'Economic Calculation in the Socialist Commonwealth'. Published 1935
Denationalisation of Money — An expansion & elaboration of the ideas in Choice in Currency. From 1976
Individualism & the Economic Order — Collection of Essays from the 40s including articles on socialist calculation, 'Use of Knowledge in Society' & 'Economics & Knowledge'
Prices & Production and other works — A collection of Hayek's early economic works including .Prices & Production .Monetary Theory and the Trade Cycle
Profits, Interest & Investment and other essays on the theory of industrial fluctuations — A collection of early Essays on industrial fluctuations
The Pure Theory of Capital — Said to have exhausted him this complex piece of work was Hayeks last major attempt at business cycle theory before turning to broader concerns.