Due to an unprecedented amount of mergers and acquisitions of companies within the media industry, the publishing business has changed dramatically throughout the last thirty years. Media companies of all types and sizes were merged into a limited amount of extremely large, diverse corporations, which held ownership over numerous media outlets (including television, film, newspapers, magazines, and book publishers).
Kratz, Michelle, "Corporate Influence: How the Media Merger Trend Changed the Book Publishing Industry and the Distribution of Information" (2009). Master of Science in Publishing. Paper 17.