Microeconomics 9th Edition by Stephen Slavin

تمرين 15

"Innovations do not remain isolated events, and are not evenly distributed in time, but... on the contrary they tend to cluster, to come about in bunches, simply because some, and then most, firms follow in the wake of successful innovation." Who made this statement?
A) Frank Knight
B) Joseph Schumpeter
C) Karl Marx
D) John Maynard Keynes