This book critically discusses and systematically compares J.M. Keynes
and F. H. Knight, two giants in the history of economic thought. In 1921
they both published apparently similar books on risk, probability, and
uncertainty. However, while Knight's contribution on risk and
uncertainty is now well recognized, Keynes's work on probability and
uncertainty has been somewhat ignored in the shadow of his more famous
The General Theory of Employment, Interest and Money (1936). Focusing
on an earlier yet equally important volume by Keynes, A Treatise on
Probability (1921), this book sheds a light on his outstanding ideas
and the lasting influence on his later works, including The General
Theory. There are few books that systematically discuss Keynes and
Knight, although there are remarkable comparisons between Keynes's
concept of probability and uncertainty and Knight's distinction between
a measurable risk and a non-measurable uncertainty. This timely book
unifies Keynes and Knight into a new, comprehensive approach to a very
complex human behavior