What characteristic is shared by us capitalism and communism

~ Use of terror as a political tool

~ Cult of personality surrounding the leader

~ Large degree of centralized political control

~ Often relying on the leader to dictate or mediate between local political  leaders

(not from my own knowledge, and from credible source)  :)

someone or something lol

explanation:

an oligopoly is a term used to clarify the structure of a particular market, industry, or organization. a market is considered oligopolistic or amazingly focused when it is shared between a few companies.