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The post-Enron disintegration of Arthur Andersen in 2002 reduced the number of international accounting firms that audit nearly all of the world''s largest public companies to the surviving Big Four -- Deloitte, EY, KPMG and PwC. Despite market dominance, double-digit annual growth and annual global revenue above $120 billion in 2014 - the viability of the Big Four and their business model faces s...