A great blog post from UC Berkeley Professor Maximilian:
“…the problem is that
perfectly competitive markets are about as common as Susan B. Anthony coins.
Most markets are in fact not perfectly competitive, which Milton Friedman of
course acknowledged. Market failures abound. The key question is whether the
costs of intervening in the markets to address the failure outweigh the
benefits.”
A few related posts:
http://vivekjayakumar.blogspot.com/2016/11/business-consolidation-and-income.html