> Unfortunately, anti-trust law seems to only be concerned with monopolies, and totally ignores duopolies and oligopolies No. Anti-trust law is all about the

> Unfortunately, anti-trust law seems to only be concerned with monopolies, and totally ignores duopolies and oligopolies No. Anti-trust law is all about the nature of the competition not the number of participants. If the market simply isn't functioning they can and have intervened.