As an economic term, competition refers to the rivalry between firms to sell the goods or services they provide. Economists generally classify different levels of economic competition by the following models:Perfect Competition, Perfectly Contestable Market, Monopolistic Competition, Oligopoly, Cartel and Monopoly | As an economic term, competition refers to the rivalry between firms to sell the goods or services they provide. Economists generally classify different levels of economic competition by the following models:Perfect Competition, Perfectly Contestable Market, Monopolistic Competition, Oligopoly, Cartel and Monopoly |