This book makes Keynes's writing on his General Theory accessible to
students by presenting this theory in a careful, consistent manner that
is faithful to the original. Keynes's theory continues to be important,
because the issues it raised, such as the problems of involuntary
unemployment, the volatility of investment, and the complexity of
monetary arrangements in modern capitalist economies, are still with us.
Keynes's method of analysis, which tries to allow for the complications
of dealing with historical time, deserves the careful attention given in
this book. Keynes's formal analysis dealt only with a short period of
time during which changes in productive capacity as a result of net
investment were small relative to initial productive capacity. Roy
Harrod and Joan Robinson were the two most prominent followers of Keynes
who attempted to extend his analysis to the long period by allowing for
the effects of investment on productive capacity as well as on effective
demand. The careful examination of their writings on this topic is a
natural complement to the presentation of Keynes's General Theory and
makes clear the severe limitations on any use of equilibrium concepts in
dealing with accumulation in models that try to observe Keynes's
warnings about an unknowable future in the type of world we inhabit.