Perfect competition exists when products are homogeneous, and there are a great many firms too small to have any influence on the market price, and firms can easily enter and exit the Blank 1 Вопрос 1industry .A Blank 2 Вопрос 1cartel is a market in a particular product in which a single producer can fix an artificial price.Monopsony is the situation in which there is only one Blank 3 Вопрос 1buyer .A Blank 4 Вопрос 1natural monopoly is an industry in which the efficient existence of more than one producer is impossible; examples include public utilities such as water, gas and electricity, where it would be inefficient to have several competing companies laying their own networks of pipes or cables.Monopolistic Blank 5 Вопрос 1competition exists when many producers of slightly differentiated products are able to sell them at well above their marginal cost.An Blank 6 Вопрос 1oligopoly is a concentrated market dominated by a few large suppliers. This is very frequent in manufacturing because of economies of scale and the cost barriers of entering an industry.Economies of scale are factors which cause the average cost of producing something to fall as output Blank 7 Вопрос 1increases .Barriers to entry are economic or technical factors that make it difficult or impossible for firms to enter a market or Blank 8 Вопрос 1compete with existing suppliers.A dominant-firm oligopoly is one in which a market leader can indicate its preferred Blank 9 Вопрос 1price to smaller competitors.A Blank 10 Вопрос 1monopoly is a group of producers or sellers who fix prices and quantities in order to avoid competition and increase profits. This is illegal in many countries, most notably the USA.