In Gandania, where the government has a monopoly on tobacco sales, the incidence of smoking-related health problems has risen steadily for the last twenty years.
在政府垄断烟草销售的 Gandania，与吸烟有关的健康问题的发生率在过去20年里稳步上升。
2
To the side sit the rusting pumps of MPPE, the state firm that this year lost its monopoly on fuel sales and distribution.
However, there are many firms that have market power or monopoly power, which means that they can increase their price above marginal cost and sustain sales for a long period of time. [1].