I need to get Tyler Goodspeed's book Rethinking the Keynesian Revolution: Keynes, Hayek, and the Wicksell Connection (HT Peter Klein).
Goodspeed highlights the "Wicksell connection" between the two, which is precisely what I've been trying to say in several recent posts as well:
"While standard accounts of the 1930s debates surrounding economic thought pit John Maynard Keynes against Friedrich von Hayek in a clash of ideology, this reflexive dichotomy is in many respects superficial. It is the argument of this book that both Keynes and Hayek developed their respective theories of the business cycle within the tradition of Swedish economist Knut Wicksell, and that this shared genealogy manifested itself in significant theoretical affinities between the two supposed antagonists. The salient features of Wicksell's work, namely the importance of money, the role of uncertainty, coordination failures, and the element of time in capital accumulation, all motivated the Keynesian and Hayekian theories of economic fluctuations. They also contributed to a fundamental convergence between the two economists during the 1930s. This shared, "Wicksellian" vision of economic problems points to a very different research agenda from that of the Walrasian-style, general equilibrium analysis that has dominated postwar macroeconomics."