Title: Why barriers to entry are barriers to understanding
Description: "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"--National Bureau of Economic Research web site.
Subjects: Antitrust law, Barriers to entry (Industrial organization)