duopolies

Noun

duopoly (countable and uncountable, plural duopolies)

1. An economic condition in which two sellers exert most control over the market of a commodity.
   • Modern examples of duopoly include the American markets for credit cards (Visa and MasterCard), smartphones (Apple and Google), soft drinks (Coca-Cola and Pepsi), and airplanes (Airbus and Boeing).
2. (broadly) The domination of a field of endeavour by two entities or people.
   • In 2011, his spirit and body were shattered by Jo-Wilfried Tsonga in the semi-finals. Last night, the stakes were just as high – even though the tournament is not out of the first week – because there is a creeping perception that the [Roger] Federer–[Rafael] Nadal duopoly is slowly giving way...2012 June 29, Kevin Mitchell, “Roger Federer back from Wimbledon 2012 brink to beat Julien Benneteau”, in Alan Rusbridger, editor, The Guardian, London: Guardian News & Media, →ISSN, →OCLC, archived...
3. (broadly) A situation in which two or more radio or television stations in the same city or community share common ownership.

   Synonyms:

   twinstick