The question reference the incidence of oligarchs. Oligarchs are
essentially king-pins which can singularly dominate entire
industries and economies. Oligarchy is often used to describe the
economic takeovers by a handful of men of Russia in the early 1990s
to the present. An example of Oligopoly was Russia's Gazprom under
Mikhail Khodorkhovsky. Individual oligarchs include Roman
Abramovich, Alisher Usmanov, and the exiled Vladimir Gusinsky and
Boris Berezovsky.