1) Oligopoly is when a particular market is controlled by a small group of firms. For example supermarkets, there are three (there usually exist three companies) companies which dominate the market, Wong and Metro, Santa Isabel and Plaza Vea, and Tottus. The main assumptions that economists make when talking about a situation of Oligopoly are various; three or four large companies dominate the industry, but small companies do exist (smaller companies in the recent example would be for example "Arakaki", a sole trader company). …
