Why Barriers to Entry are Barriers to Understanding
NBER Working Paper No. 10577
This paper discusses and criticizes the usual definitions of barriers to entry. The failure of the concept of barrier to entry to incorporate a time dimension means that it is a concept that is in need of additional embellishment in order to be useful in a practical problem or for antitrust or regulatory proceedings.
Published: Carlton, Dennis W. "Why Barriers To Entry Are Barriers To Understanding," American Economic Review, 2004, v94(2,May), 466-470.