He said that on housing, Labour «bet the ranch on the private oligopoly of house builders but it's in their interests to bank land and ration housing so that house prices continue to rocket». (independent.co.uk)
Another issue, is that of a Monopoly / Oligopoly in Canada vs more competition in the US. (creditwalk.ca)
It is a nice cozy oligopoly with ever increasing bills for the same service. (gigaom.com)